On May 16, the Seattle Changbal Dev Conference brought together developers, founders, researchers, and technology leaders for a full day of technical talks and networking.

The event featured eight presentations delivered primarily in Korean. However, nearly 30% of attendees were English speakers.

For the organizers, this created a familiar challenge:

How do you make technical content accessible to a multilingual audience without adding interpretation booths, expensive equipment, or a dedicated operations team?

At many conferences, solving this problem requires interpreters, specialized hardware, separate displays, and additional staff.

At Changbal Dev Conference, the solution was much simpler.

The entire event ran with real-time English subtitles using only the presenter’s MacBook and BizCrush.

Event at a Glance

• 8 Korean-language presentations

• 30% English-speaking attendees

• 1 MacBook running BizCrush

• 1 event operator

• 0 interpretation booths and dedicated subtitle staff

The result was a fully bilingual conference experience without changing the event's existing setup.

Why Real-Time Translation Is Difficult at Developer Conferences

Developer conferences create a unique challenge for real-time translation systems.

Unlike traditional business meetings, presentations often include:

• Rapid speaker pacing

• Technical terminology

• Mixed Korean and English expressions

• Code snippets and pseudocode

• Product names and proper nouns

• Live audience questions

• Frequent topic switching

Many translation solutions struggle in these environments.

Common issues include:

• Subtitle delays that disrupt the flow of the presentation

• Incorrect translation of technical terms

• Complex audio infrastructure requirements

• Additional staffing needs

• Attendee-side app installation requirements

The Changbal organizers wanted to create an experience where global attendees could follow every session without increasing operational complexity.

Running the Entire Event from One MacBook

BizCrush approached the problem differently.

Instead of requiring dedicated interpretation infrastructure, the presenter simply connected their MacBook to the venue display and enabled Presentation Overlay Mode.

Real-time English subtitles appeared directly over the presentation slides.

• No secondary display was needed.

• No interpretation booth was needed.

• No separate subtitle operator was needed.

The subtitles remained stable throughout slide transitions and animations while preserving the overall presentation design.

One of the most impressive parts of the event was how simple the operation became. The entire subtitle workflow was managed directly by Changbal President Hyesun An.

After a brief walkthrough, she was able to:

• Start and stop sessions

• Adjust subtitle placement

• Manage presenter transitions

• Monitor recordings

• Keep the conference running smoothly

without requiring technical assistance.

For community-driven events with limited staffing, this simplicity proved just as important as the translation itself.

Translation Quality That Held Up on Stage

The conference covered a wide range of topics, from software engineering and AI to startup building and developer productivity.

During one session, Ju An Kang, Senior Software Engineer at Microsoft, delivered a Korean-language presentation rich in nuanced explanations and references. English-speaking attendees were able to follow the presentation in real time through the subtitles displayed on the main screen.

Another session featured Minseok Jeong discussing highly technical topics, including Reflection-Augmented Scaling, algorithm design, and pseudocode structures.

Rather than producing literal word-for-word output, BizCrush generated subtitles that preserved the technical context of the discussion.

Even in situations involving:

• Technical jargon

• Mixed-language speech

• Fast presentation speed

• Audience participation

• Product-specific terminology

The subtitles remained consistent and readable throughout the sessions.

Capturing Context, Not Just Words

One moment particularly stood out to the event organizers.

During a presentation, a uniquely Korean expression appeared that would have sounded awkward if translated literally.

Instead of forcing a direct translation, BizCrush preserved the original phrase and presented it in a way that maintained its cultural context.

After the event, the operations team commented:

"It preserved the nuance of unique Korean proper nouns without distortion."

For global audiences, this distinction matters. Good subtitles do more than convert speech from one language into another. They help preserve the speaker's intent, context, and meaning.

No Wireless Microphones. No Audio Mixers.

Another standout for attendees was BizCrush's speech recognition.

The event did not rely on wireless microphones for audience participation.

Questions from attendees were often asked directly from their seats.

Even so, BizCrush was able to recognize and subtitle audience questions using only the MacBook's built-in microphone.

This flexibility makes the system particularly useful for community events, hackathons, university programs, startup demo days, and meetups where professional AV infrastructure may not be available.

The Feature Everyone Asked About

Throughout the conference, organizers repeatedly received the same question from attendees:

"What tool is generating those subtitles?”

Many participants noticed the subtitles almost immediately.

Some assumed a dedicated translation team was operating behind the scenes. Others were surprised to learn that the entire system was running from a single laptop.

For the organizers, this reaction validated an important point:

When multilingual support becomes effortless, it stops feeling like an extra feature and starts feeling like a natural part of the event experience.

What's Next: Seattle Changbal Innovation Hackathon

Following the success of the conference, the Changbal team plans to continue using BizCrush at future events.

Attendees will also be able to experience BizCrush again at the upcoming Changbal Hackathon in Seattle on June 20.

To support teams building voice-powered products, all participants will receive BizCrush Voice API credits during the event.

The team that creates the most impactful voice application using BizCrush technology will receive the BizCrush Best Problem Solver Award, along with one year of unlimited BizCrush access for every member of the winning team.

Making Global Events Practical

Global audiences are no longer limited to large enterprise conferences.

Today, multilingual communities exist everywhere:

• Developer meetups

• Startup demo days

• University programs

• Hackathons

• Technical workshops

• Community-led events

The challenge is no longer whether multilingual experiences are needed. The challenge is making them practical.

At the Seattle Changbal Dev Conference, organizers delivered a fully bilingual experience with one laptop and no specialized interpretation infrastructure.

As global participation becomes the norm, we believe that simplicity will become the new standard for event communication.

And that's exactly what BizCrush is building.

This guide walks you through everything you need to run BizCrush smoothly at an event—from pre-event setup and live caption display to on-site checklists, MC announcement scripts, and frequently asked questions.

With just a laptop or smartphone and Wi-Fi, you can provide real-time multilingual captions and voice translation—no special equipment or professional interpreter required.

1. Getting the Most Out of BizCrush

With BizCrush, you can offer the following features at your event:

• Real-time captions: Converts the presenter's voice into text and displays it on screen.

• Multilingual translation: Provides captions in multiple languages, including Korean, English, Japanese, and more.

• Easy access for attendees: Attendees can scan a QR code and view captions instantly on their own smartphones.

• Audio translation: Attendees can listen to translated audio in their preferred language in real time.

How BizCrush Works

1. Microphone pickup — the device microphone captures the presenter's voice.

2. AI translation — speech is converted to text and translated into the selected language.

3. On-screen captions — the recognized speech appears as real-time captions.

You do not need a separate microphone. BizCrush uses the built-in microphone on the smartphone or laptop running the app, so place the device where it can hear the sound clearly.

Good placement options include:

• Near the presenter on stage

• Close to the venue's loudspeaker

• Anywhere the presenter's voice can be heard clearly

2. Pre-Event Setup

Preparing these items beforehand will make event-day operations much easier.

A. Create a Meeting Room in Advance

Creating a meeting room ahead of time allows you to prepare the attendee QR code for signage, printed materials, or a waiting screen before the event begins.

1. In the BizCrush app, tap the microphone button to start a new meeting.

2. Once the room is created, immediately tap Stop Recording. This saves the prepared meeting room without leaving the recording active.

3. Rename the meeting room to match the event name. This will make it easier to find on the day of the event.

B. Invite and Assign Co-Host Access

If you invite your BizCrush support contact to the meeting room in advance and assign them as a co-host, they can help you remotely on the day of the event.

1. Open the ☰ Side Menu in the top-right corner.

2. Tap + Add Participant and enter the support contact's email address.

3. In the participant list, press and hold the support contact's name for about 3 seconds, then assign Co-Host access.

👉 For the full step-by-step walkthrough with screenshots, see [Setup Guide, Section 4: Assigning Co-hosts].

C. Upload Presentation Materials

To help the AI recognize technical terms, proper nouns, and other event-specific vocabulary more accurately, upload your presentation materials and extract Context from them.

1. Open the ☰ Side Menu in the top-right corner.

2. Tap Manage Context.

3. Use the Upload PDF / DOCX File at the top to automatically extract Context, or manually add Context in the input field.

Need to upload multiple files?

Currently, the system supports uploading only one file at a time. If you have multiple presentation files, combine them into a single PDF before uploading.

👉 For the full walkthrough with screenshots, see [Setup Guide, Section 5: Registering Custom Keywords].

D. Day-of-Reminder

On the day of the event, do not create a new meeting room. Open the meeting room you prepared above and start recording from there.

1. Find the meeting room you created earlier (using the event name to locate it quickly).

2. Confirm the meeting room name.

3. Start recording from that room.

3. Caption Display Options for Different Event Setups

There are two main ways to display captions on the event screen. Choose the option that best fits your venue setup and equipment.

Which Option Should You Use?

A. Presentation Mode

• Setup: Uses two devices

• How it works: Displays captions on a separate full-screen caption view

• Best for: Mid-sized to large events with a dedicated caption screen

• Requirement: Open the shared link in a browser

• Advantage: More stable operation because the caption screen is separate. The presentation laptop does not need the BizCrush app installed.

  
  

  

B. Overlay Captions

• Setup: Uses one device

• How it works: Displays a semi-transparent caption window over the presentation slides

• Best for: Small events with a single display

• Requirement: Run the desktop app on the presentation laptop

• Advantage: Captions can appear directly on top of the slides, so you do not need a separate caption screen.

  
  

  

A. Use Two Devices: Presentation Mode

Presentation Mode is the recommended option when you prefer not to touch or modify the presentation laptop.

1. Sound Recognition: Place the Device Running BizCrush

1. Open the BizCrush app on a staff member's smartphone or an extra laptop, then start the meeting.

2. Place this device near the presenter on stage or right in front of the venue's loudspeaker.

3. Once the event starts, avoid moving or touching the device unless necessary.

2. Display: Set Up the Output Screen

1. The presentation laptop or monitor connected to the display does not need the BizCrush app installed.

2. Open an internet browser, such as Chrome, and paste the share link for the BizCrush meeting that is currently recording.

3. The captions will appear on screen.

👉 For instructions on copying links and displaying screens, see [Setup Guide, Section 3.B: Presentation Mode Setup].

B. Use One Device: Overlay Captions

Use Overlay Captions when you need to show both the presentation slides and captions on the same screen.

1. Install and run the BizCrush desktop app on the presentation laptop connected to the screen.

2. Start a meeting in the app, then tap Open Overlay Captions to turn it on.

3. Make sure the presentation laptop can clearly hear the presenter's voice. Ideally, place it near the front of the stage or close to a loudspeaker.

Note: The desktop app can be downloaded from the BizCrush main homepage.

👉 For instructions on enabling overlays, see [Setup Guide, Section 3.A: Overlay Subtitle Setup].

4. Pre-Event Checklist

To keep the event running smoothly, check the following items before the event starts.

Basic Installation and Permissions

• Install the app on the devices you will use for the event.

• Allow the installed app to access the microphone.

• If you allowed permissions during the first launch and a test recording works properly, your setup is complete.

• If recording does not work, check the Microphone section in your device settings and confirm that BizCrush has permission.

Prevent the Screen from Turning Off

• If the recording device screen turns off during the event, especially on a laptop, recording may stop.

• Make sure to disable auto screen lock, display sleep, or power-saving mode in the device settings.

Language Settings

• Select the presenter's language and the language you want captions to be translated into.

• If your event requires multiple languages, check the necessary language combinations in advance.

👉 For instructions on setting the language, see [Setup Guide, Section 3 → Common Setup Steps, Steps 2–3].

Keyword Registration

• Add frequently used proper nouns, organization names, presenter names, and technical terms before the event.

• You can upload a presentation PDF or DOCX, or add Context manually.

👉 For instructions on registering keywords, see [Setup Guide, Section 5: Registering Custom Keywords].

Microphone Test

• Place the device in its actual event location, then test it using the stage microphone.

• Confirm that text appears on screen and that the caption response speed feels appropriate.

QR Code Placement

• Display the QR code at the venue entrance or on the waiting screen so attendees can view captions on their own smartphones.

👉 For instructions on finding the QR code, see [Setup Guide, Section 6: Sharing Subtitles with Attendees].

Final Rehearsal

• Under conditions similar to the actual event, test the full flow once: start recording → display captions → share the QR code.

5. MC / Host Announcement Script

If you would like to introduce BizCrush at the beginning of the event, you can use the script below.

Today's event offers real-time multilingual captions and voice translation for our global attendees.

Please scan the QR code shown on screen using your smartphone camera.

You can choose your preferred language and view captions instantly without installing an app.

If you use personal earphones, you can also listen to translated audio in real time.

Q&A

Q. How do I stop the recording? Can I stop it from any device that is logged in?

A. A session recording can only be stopped from the device that started the recording.

For example, if you started the meeting on a smartphone, you cannot stop the recording from a laptop. Plan accordingly during the event.

Q. The presenter is talking, but captions are not appearing on screen.

A. The device may not be hearing the sound clearly.

Try moving the recording device, whether it is a smartphone or laptop, closer to the venue loudspeaker or to a location where the sound is clearer.

Also, check that recording is actually in progress and that microphone access has been allowed.

Q. Captions are showing, but the translation language is wrong.

A. Check whether the correct translation language is selected in the real-time transcript panel.

Change it back to the language you need.

Q. I am using the real-time caption overlay feature, but the caption text is too small.

A. For Overlay Captions, change the caption size to Large or Extra Large in the caption settings.

For Presentation Mode, you can adjust the display size using your browser shortcuts: Cmd/Ctrl + +/-.

Q. Can I run the event without recording for privacy reasons?

A. Yes — click the Padlock icon in the bottom toolbar to enable Privacy Mode. Real-time translation continues to work, but no voice data or transcripts are saved to your device or BizCrush servers.

If the issue is not resolved, please contact us anytime at business@bizcrush.ai.

👉 For more troubleshooting scenarios, see [Setup Guide, Section 7: Event Day Checklist & Troubleshooting].

Host global conferences and seminars seamlessly — with no expensive equipment or live interpreters required.

With just the BizCrush app, you can handle real-time translation, live subtitles, AI summaries, and instant sharing all at once.

This guide walks event hosts through the entire process — from pre-event setup to live execution — so your session runs flawlessly.

1. What BizCrush Offers at Your Event

BizCrush captures spoken audio in real time, converts it to text, translates it into your preferred language, and displays it as subtitles on screen.

For the Host (Presenter's Screen)

• Display live subtitles directly over your presentation screen (Overlay Subtitle Mode).

• Subtitles remain on top even when you switch between slides, browsers, or other apps.

• Fully customizable subtitle display (Transcript + Translation, Transcript only, Translation only, font size, and number of lines).

For Attendees (Audience Devices)

• Attendees simply scan a QR code or click a link to view live transcripts and translations on their own devices.

• No app installation or sign-up required for attendees.

• Live Audio Translation: Attendees can listen to the translated audio in real time (personal earphones strongly recommended).

Language Support

• Supports 45 languages in total.

• Speech Recognition: Recognizes up to 3 spoken languages simultaneously.

• Real-time Translation: Outputs up to 2 translated languages simultaneously.

2. Pre-Event Preparation Checklist

To ensure a smooth event, please complete the following steps before event day.

Host's Preparation Checklist

• Create a BizCrush account (both Host and Co-hosts)

• Install the Desktop App (Windows or macOS)

• Decide on your languages (Spoken Language + Translation Language)

• Register Custom Keywords (add event-specific jargon and presentation materials → see Section 5)

• Assign Co-hosts (if you have staff assisting you → see Section 4)

• Do a Dry Run (test subtitle mode in advance)

Create an Account

Search for "BizCrush" on the App Store or Google Play and download the app. You can sign up using Google, Apple, or email.

Install the Desktop App

Go to bizcrush.ai and click [Download PC Version] (available for both Windows and macOS) to install the desktop app.

Note: Real-time Overlay Subtitles are only available on the Desktop App.

3. Setting Up Real-Time Subtitle Modes

First, choose the subtitle display method that best fits your venue's screen setup.

Common Setup Steps

Complete these steps on the presenter's desktop computer on event day.

Step 1. Create a Meeting & Start Recording

From the home screen, click the Microphone icon to create a new meeting room and start recording.

Step 2. Open Language Settings

As soon as the meeting starts, the Live Transcript panel opens. Click the language icon at the top of the panel to open language settings.

Step 3. Select Spoken & Translation Languages

Manage both transcription and translation settings here. Select the language the speaker will use, and the language you want to display on screen.

A. Overlay Subtitle Setup

Follow these steps if you want subtitles to float over your presentation slides.

A-1. Open the Overlay Subtitle Menu

Click the Subtitle icon at the top right of the Live Transcript panel to open the Overlay options.

A-2. Customize Overlay Settings

Adjust the options below to fit your screen size and event environment:

• Display: Transcript + Translation / Transcript only / Translation only

• Size: Small / Medium / Large / Extra Large

• Height: 2 lines / 3 lines / 5 lines / Unlimited

A-3. Adjust Overlay Position

Once configured, turn on the Overlay toggle. The subtitle window will appear on your screen — drag and drop it to any location.

Tip: For large projectors, we recommend Large text and 3 lines. For smaller monitors, Medium and 2 lines work best.

A-4. Close Subtitles

When you no longer need the subtitles, hover over the subtitle window and click the [X] button to close.

B. Presentation Mode Setup

Follow these steps if you have a separate, dedicated monitor or browser window just for subtitles.

B-1. Create a Meeting & Start Recording

As with Overlay mode, click the Microphone icon on the home screen to start a meeting.

B-2. Copy the Share Link

Click [Share Meeting].

Then click [Copy Link].

B-3. Open the Share Link in a Browser

Open a web browser on the device connected to your dedicated subtitle screen, and paste the copied link into the address bar.

B-4. Open the Presentation Menu

Once the live transcript page loads, click the [▶ Presentation] button in the top right corner to open the settings panel.

B-5. Configure Subtitle Settings

Adjust display, size, and other options in the panel to fit your venue.

B-6. Launch Presentation Mode

Once you are done configuring, click the [Present] button at the bottom. A dedicated subtitle screen will launch, and real-time translated text will appear as soon as audio is recognized.

B-7. Enter Full-Screen Mode

For a clean look on the venue screen, switch your browser to full-screen mode so the address bar disappears.

• Chrome (Windows): Press F11.

• Chrome (macOS): Press Control + Command + F.

• Safari (macOS): Press Control + Command + F. (Note: Uncheck "Always Show Toolbar in Full Screen" in the View menu so the top bar doesn't block subtitles.)

4. Assigning Co-hosts

If the host needs to focus purely on presenting, you can delegate meeting management to your staff by assigning them as Co-hosts.

Note: Co-hosts must create a BizCrush account before the event.

What Co-hosts Can Do

Edit live transcripts, start and stop recording, change meeting names, assign speaker labels, and generate and send follow-up emails.

How to Assign a Co-host

1. Open the [☰ Side Menu] in the top right corner.

   
   

   

   
   

2. Select [+ Add Participant].

   
   

   

   
   

3. Enter your staff member's email address to invite them.

   
   

   

   
   

4. Long-press (click and hold for 3 seconds) on the invited user's name to open the Co-host menu.

   
   

   

   
   

5. Select [Add to Co-Hosts].

   
   

   

5. Registering Custom Keywords

Pre-registering industry jargon, proper nouns, or acronyms dramatically improves speech recognition and AI summary quality.

How to Register Keywords

1. Open the [☰ Side Menu] in the meeting room.

   
   

   

   
   

2. Click [Manage Context] at the bottom.

   
   

   

   
   

3. Choose your preferred method:

   
   

   

   
   

   • Upload PDF File: Upload your presentation deck, event agenda, or briefing doc. Key terms are extracted automatically.

     
     

     

   
   

   • Add Note: Type specific words directly into the Enter keyword field and click [Confirm].

     
     

     

Tip: Focus on unique proper nouns — event names, speaker names, and specific acronyms (e.g., GSKA, K-Fest).

6. Sharing Subtitles with Attendees

BizCrush allows attendees to view subtitles directly on their own smartphones or laptops without downloading any app.

Note: There are two QR codes depending on the experience you want to provide.

How to Share the Meeting Room

1. Click the [Sharing Menu].

   
   

   

   
   

2. Either copy the link to send via email or chat, or display the generated QR code on your screen for attendees to scan.

   
   

   

Tip: Put this QR code on your opening presentation slide or print it on flyers at the venue entrance.

Attendee Screen — Meeting Room

When an attendee scans the meeting room QR code or joins via a shared link, the screen below appears.

• They can switch between the Live, Summary, and Transcript tabs in their browser to view the content.

• They can choose the original transcript, translation, and display format in their preferred language.

• When they select a language using the Live Audio Translation feature, the translated audio plays in real time.

• They can stay connected for up to one hour after the meeting ends.

How to Share Presentation Mode

When attendees scan the Presentation Mode QR code, they are directed to a dedicated viewer for the subtitles.

1. To enable access, turn on the [Show QR] option in the settings panel.

   
   

   

   
   

2. Attendees can then scan the QR code to view the subtitles via a browser on their preferred device.

   
   

   

Attendee Screen — Presentation Mode

When an attendee scans the Presentation Mode QR code, the screen below appears.

• They are redirected to the dedicated subtitle viewer in their browser.

• They cannot adjust settings such as language.

• They see the same subtitles as the main screen, mirrored on their own device.

7. Event Day Checklist & Troubleshooting

Pre-Session Checklist

• Desktop App launched and logged in

• Meeting created, and recording started

• Spoken Language and Translation Language confirmed

• Custom keywords registered

• Overlay turned on and positioned (if using Overlay mode)

• Share link / QR code tested and displayed for attendees

• Microphone audio check (speak into the venue mic and confirm text appears)

Common Issues & Solutions

Q. The microphone is blocked / no text is appearing.

A.Go to your computer's OS settings → Privacy/Security → Microphone and ensure BizCrush has permission to access your microphone. Also, move the laptop or phone closer to the venue's PA speakers or the presenter.

Q. The Overlay subtitles aren't showing up.

A.Make sure you are using the Desktop App — Overlay does not work on the mobile app or web browser version. Then check that the Overlay toggle is turned ON in the settings.

Q. Presentation Mode isn't working.

A.Ensure that the meeting is actively recording on the host device. If the link was opened before recording started, refresh the browser page.

Q. Accuracy drops because the venue is too noisy.

A.BizCrush uses AI noise cancellation, but in highly reverberant rooms, physical placement matters. Place the recording device as close to the PA speaker output or the presenter as possible.

Q. I have privacy concerns about recording.

A.Click the Padlock icon in the bottom toolbar to turn on Privacy Mode. When enabled, no voice data or transcripts are saved to your device or our servers — only real-time translation will function.

Need Help?

If you have any questions or require technical support for your event, please contact us anytime at business@bizcrush.ai.

What You Can Build

• 🎙️ Real-time Speech-to-Text via WebSocket (15 languages, auto-detected)

• 📁 File transcription + speaker diarization (who said what + timestamps)

• 🤖 AI meeting summaries + Q&A (Claude-powered, custom prompts)

• 🔗 MCP server — control BizCrush from Claude or Cursor with natural language

• ⚡ Zapier — push meeting data to Slack, Notion, and Google Docs automatically

STEP 1 — Get Your API Key

1. Go to https://bizcru.sh → Sign up (Google login supported)

2. Navigate to Settings → https://bizcru.sh/en/settings

3. Scroll down to the API Keys section

4. Click the purple "Issue API Key" button

   1. ⚠️ Copy it immediately — it will NOT be shown again!

5. Save it: BIZCRUSH_API_KEY=sk-prod-xxxxxx

You can issue up to 5 keys per account.

QUICK START — File Transcription

Base URL: https://extapi-stt.bizcrush.aiAuth: ?api_key=YOUR_API_KEY (query parameter)

curl -X POST "<https://extapi-stt.bizcrush.ai/stt?api_key=YOUR_API_KEY>" \\\\

  -H "Content-Type: application/json" \\\\

  -d '{"audio_url": "<https://example.com/audio.mp3>", "enable_diarization": true}'

Response includes:

• text — full transcript

• detected_language — auto-detected language code

• utterances[] — speaker-diarized segments with start_ms, end_ms, speaker, confidence

Set the timeout to 600+ seconds for long audio files.

QUICK START — Live STT via WebSocket (Python)

pip install websockets

import asyncio, json, websockets

async def live_stt(api_key):
    url = f"wss://extapi-stt.bizcrush.ai/?api_key={api_key}&format=json"
    async with websockets.connect(url) as ws:
        # 1. Send config
        await ws.send(json.dumps({"encoding": "pcm16"}))
        resp = json.loads(await ws.recv())
        print("Connected:", resp)  # {"connected": true}

        # 2. Stream PCM16 audio as binary frames (640 bytes = 20ms chunks)
        # 3. Receive interim + final results:
        async for msg in ws:
            data = json.loads(msg)
            if "chunk" in data:
                status = "FINAL" if data["chunk"]["is_final"] else "interim"
                print(f"[{status}] {data['chunk']['text']}")

asyncio.run(live_stt("YOUR_API_KEY"))

Audio format: PCM16 — 16kHz, mono, 16-bit little-endian, 640 bytes/chunk (20ms)

QUICK START — Live STT (JavaScript / Browser)

const ws = new WebSocket(
  "wss://extapi-stt.bizcrush.ai/?api_key=YOUR_API_KEY&format=json"
);

ws.onopen = () => ws.send(JSON.stringify({ encoding: "pcm16" }));

ws.onmessage = (event) => {
  const data = JSON.parse(event.data);
  if (data.connected) console.log("Connected! Start sending audio...");
  if (data.chunk) {
    console.log(`[${data.chunk.is_final ? "FINAL" : "interim"}] ${data.chunk.text}`);
  }
};

// Send raw PCM16 audio as binary frames
function sendAudioChunk(pcmData) {
  if (ws.readyState === WebSocket.OPEN) ws.send(pcmData);
}

QUICK START — Meeting REST API

Base URL: https://extapi.bizcrush.aiAuth: X-API-Key: YOUR_API_KEY (header)

# Create a meeting
curl -X POST <https://extapi.bizcrush.ai/v1/create-meeting> \\
  -H "X-API-Key: YOUR_API_KEY" \\
  -H "Content-Type: application/json" \\
  -d '{"title": "Hackathon Demo", "participant_ids": ["<em:teammate@email.com>"]}'

# AI Summary with custom prompt
curl -X POST <https://extapi.bizcrush.ai/v1/summarize-meeting> \\
  -H "X-API-Key: YOUR_API_KEY" \\
  -H "Content-Type: application/json" \\
  -d '{"meeting_id": "MEETING_ID", "user_prompt": "List action items only"}'

# Ask AI about a meeting
curl -X POST <https://extapi.bizcrush.ai/v1/ask-ai-for-meeting> \\
  -H "X-API-Key: YOUR_API_KEY" \\
  -H "Content-Type: application/json" \\
  -d '{"meeting_id": "MEETING_ID", "message": {"text": "What were the key decisions?"}}'

# Get live transcription (poll every 1s)
curl -X POST <https://extapi.bizcrush.ai/v1/get-live-transcription-chunks> \\
  -H "X-API-Key: YOUR_API_KEY" \\
  -H "Content-Type: application/json" \\
  -d '{"meeting_id": "MEETING_ID", "last_updated_at": "1970-01-01T00:00:00Z", "limit": 100}'

MCP SETUP — Use BizCrush from Claude or Cursor

Add to your .mcp.json:

{
  "mcpServers": {
    "bizcrush": {
      "type": "sse",
      "url": "<https://bizcrush-mcp-1071354765717.us-central1.run.app/sse>"
    }
  }
}

Then just talk to Claude naturally:

• "Summarize my last meeting."

• "Get the transcript from today's call."

• "Send a message to meeting XYZ."

Supported Languages (auto-detected)

API Endpoints Overview

STT API (https://extapi-stt.bizcrush.ai)

Meeting REST API (https://extapi.bizcrush.ai)

Links

BizCrush Inc.

• Support: help@bizcrush.ai

• Business: business@bizcrush.ai

BizCrush turns real conversations into clear notes, follow-ups, and next steps — in minutes. This guide walks you through your first recording and follow-up.

Before You Start

Note: This walkthrough is based on the mobile app. BizCrush is also available on Windows and macOS desktops.

Mobile: Search for BizCrush in the App Store or Google Play and download the app.

Desktop: Go to bizcrush.ai and click Get BizCrush on Any Device to download the desktop version.

1. Create Your Account

Sign up with your Google, Apple, or email account.

Once you log in, you'll see the home screen where all your meeting rooms are listed.

What's a Meeting Room?

• A Meeting Room organizes your recordings, transcripts, and participants in one place.

• You can create separate rooms for different meetings, or keep multiple recordings in the same room.

2. Record Your First Meeting

There are two ways to get started. Choose the one that fits your situation.

Option A: Record a Live Meeting

First, make sure microphone access is enabled. When prompted, tap Allow to grant permission.

Note: If you've already denied microphone access, go to Settings > Apps > BizCrush > Permissions and enable it.

Tap the microphone button on the home screen to create a new meeting and start recording.

Once recording starts, tap View Live Transcript at the top to see real-time transcription and translation.

When the meeting is over, tap the Stop button to end and save the recording.

Note: To generate the post-meeting transcript and summary, you must tap the stop button to end and save the meeting.

Tip: You can edit the transcript directly by tapping any line, even while recording is still in progress.

Option B: Import an Existing Recording

• Use this option if you already have a recorded audio file, such as .mp3 or .m4a.

• Tap the + icon in the meeting room toolbar.

• Select <Upload audio>, then choose the file you want to import.

BizCrush will automatically transcribe the file and generate a summary.

3. Set Up Translation

For multilingual meetings, tap the globe icon in the meeting room to open Language Settings.

• BizCrush can detect up to 3 spoken languages at once and translate into up to 2 preferred languages in real time.

You can also change the translation language directly from the transcript view.

4. Review Your Transcript and Summary

After the meeting ends, BizCrush automatically generates a refined post-meeting transcript and summary.

Note: Summary generation may take a few minutes depending on the recording length.

View the Summary

Tap the AI Summary card in the meeting room to view the full summary, including key discussion points and structured sections.

• Tap any referenced section to jump directly to that part of the transcript.

Swipe for Live Summary

During recording, you can swipe right on the transcript view to check the live summary as each discussion topic wraps up.

Assign Speaker Names

Tap a speaker label to assign names. This makes follow-up emails more personalized and helps you review conversation history by person.

Tip: Register your voice in Settings

• BizCrush can better identify who's speaking.

• Go to Settings > Meeting Settings > Voice Enrollment

Get Your Summary by Email

As soon as the recording ends, BizCrush automatically creates a structured summary and sends it to all invited participants in the meeting rooms via email.

• If you have a preferred summary format, you can customize it on the desktop version. Drag the meeting record into the <Ask AI> feature and request a tailored summary.

• Depending on recording length, this may take a few minutes.

5. Generate a Follow-Up Email

Once the summary is ready, tap the email icon in the meeting room toolbar. BizCrush will generate a follow-up email based on your meeting content.

Open the email draft to review, edit, or send it.

• You can also ask the AI to adjust the tone or style — for example, type "Please make the tone more polite" in the request field.

6. Export and Share

Export to HubSpot or Notion

Tap the menu icon (☰) in the top-right corner of the meeting room to open the settings menu.

• From there, you can sync your meeting to HubSpot or save it to Notion.

Note: You'll need to log in to HubSpot or Notion the first time you connect.

Share a Live Meeting

Share your live meeting with anyone — no app install or sign-up required

• Tap the share icon in the toolbar to copy a link or display a QR code.

• Recipients can view the live transcription and translation directly in their browser.

With <Anyone with the link can view> enabled,

• Anyone can view the live transcript during the meeting or for up to one hour after the meeting ends.

• No login or sign-up required—access available through a web browser.

Tip: If a participant signs up through the shared meeting room:

• The host receives additional BizCrush meeting usage credits

• The new user can access and revisit the meeting anytime from their logged-in account

Live Audio Translation for Viewers

Anyone viewing the shared meeting in their browser can hear real-time audio translation. They simply select their preferred language from the Live Audio Translation menu.

Use Privacy Mode for Confidential Meetings

For meetings that involve private or confidential discussions, you can enable Privacy Mode.
Privacy Mode allows you to use real-time transcription and translation without retaining any voice recordings.

• To enable Privacy Mode, tap the lock icon in the toolbar before or during the meeting.

• As long as Privacy Mode is enabled before the recording is completed, audio will not be stored.

When Privacy Mode is enabled:

• Real-time transcription and translation function as usual during the meeting.

• No voice recording files are saved anywhere.

• If you delete the meeting room after the meeting, no data remains on the server.

For organizations with stricter data requirements, BizCrush also supports:

• Private cloud deployment.

• On-premises deployment.

• Enterprise configurations where data is stored only within the organization’s internal systems (e.g., internal wiki), and not on our private servers.

FAQ

What do I do if microphone access is blocked?

• When you first open the app, a permission pop-up appears.

• If you denied it, go to Settings > Apps > BizCrush > Permissions and allow microphone access.

Does BizCrush send meeting summaries by email?

• BizCrush sends the meeting summary automatically after you end the meeting.

• For longer recordings, summary generation may also take a few minutes.

Why didn’t I receive a meeting summary email?

• Tap Stop to end the recording before closing the app—otherwise, the summary won’t be generated.

• Summary emails are sent to the email address linked to your sign-in account from: no-reply@mail.bizcrush.ai

• If you don't see it in your email, check your spam folder and add the sender to your contacts.

What is Privacy Mode?

• Privacy Mode allows you to use live transcription and translation without retaining any voice recordings.

• No audio data is stored on your device or on the server.

• If the meeting room is deleted after the meeting, no data remains on the server.

Can BizCrush be used for confidential or security-sensitive meetings?

• Yes. With Privacy Mode enabled, no voice recordings are stored. Only real-time transcription is provided during the meeting.

Does BizCrush comply with recording consent laws?

• Recording consent laws vary by location. In the United States, requirements differ by state.

• We recommend informing all participants and obtaining consent before recording.

What languages are supported?

• BizCrush supports up to 45 languages.

• Live Translation can recognize up to 3 languages at once and translate into 2 languages in real time.

Which CRMs does it integrate with?

• BizCrush currently integrates with HubSpot and Notion.

• You can export meeting notes automatically and share them with teammates.

• For enterprise, we also support options like storing meeting records in your internal wiki.

• If you need any additional integrations, feel free to email us.

Can I use it on both mobile and desktop?

• Yes. BizCrush supports iOS, Android, Windows, and macOS.

• With the same account, you can view and edit your data across devices.

Where are my recordings stored?

• Original recordings are stored on your device only.

• For multi-device sync, an encrypted copy is temporarily stored on the server for 48 hours and then automatically and permanently deleted.

Can I upload existing recordings?

• Yes. You can upload audio files you already have, transcribe them, and generate summaries.

What file formats can I upload?

• BizCrush supports common audio formats, including MP3, M4A, WAV, and OGA.

What's the difference between live transcription and post-meeting transcription?

• Live transcription captures speech as it happens in real time.

• Post-meeting transcription is generated after the recording ends, with AI refining the text for better readability and accuracy.

Where is the meeting summary?

• As soon as the recording ends, BizCrush automatically organizes the meeting content into a structured summary, which is sent via email to all invited participants and to each meeting room.

• If you have a preferred summary format, you can customize it on the desktop version. Drag the meeting record into the <Ask AI> feature and request a tailored summary.

• Depending on recording length, this may take a few minutes.

How does email follow-up work?

• BizCrush analyzes the conversation and creates a personalized follow-up email draft based on the meeting content.

• You can edit it or ask the AI to adjust the tone before sending.

• If you skip this step, the summary won't be created.

Can I use BizCrush for free?

• Yes. BizCrush offers up to 7 hours of use with a free subscription, but advanced features like translation and live audio translation use tokens faster.

You're All Set

Start your first meeting with BizCrush today — BizCrush handles the notes and follow-up.

Questions or Partnership? Reach us anytime at business@bizcrush.ai.

When people think about communication tools, they imagine quiet offices or Zoom calls.

But that’s not where communication actually breaks. It breaks in real-world environments — on job sites, at crowded in-person events, and in fast-moving situations where you can’t pause and type something into Google Translate.

Recently, we’ve seen BizCrush used in places like this — where conventional tools simply don’t work.

On a Construction Site — One Phone, No Setup

A Portuguese-speaking worker on a U.S. construction crew struggled with daily communication.

Instructions were fast. The environment was loud. And there was no room for misunderstanding.

This wasn’t just about translating words, but it was about keeping up with real-time coordination.

Using BizCrush on his phone — no setup required — he got:

• real-time translation

• audio playback in his preferred language

• real-time summary and records, even in a noisy environment

For the first time, he could follow conversations as they were happening.

He didn’t slow the team down anymore. He became part of it.

Construction is one of the most linguistically diverse industries in the U.S.

But almost no tools are built for it.

The Cross-Border Event — 80+ People, Bilingual Captions on Screen

At the K-Initiative launch event hosted by the Korean Consulate General and KSC Seattle, the challenge was different — language barriers in cross-border, multicultural settings.

More than 80 people. Two languages: Korean and English.

Usually, organizers have two options:

• Hire interpreters (expensive and limited)

• Or accept that some people won’t fully understand

Instead, BizCrush was used to provide during the session:

• real-time Korean–English translation

• bilingual subtitles on a shared screen

Now, over 80 attendees followed every speaker in both languages, in real time—no interpreters, extra hardware, or pre-event setup beyond a screen.

Everyone in the room could follow every speaker in real time. It worked at the event scale.

What These Cases Have in Common

The environments were completely different:

• a noisy construction site

• a formal international event

But the core problem was the same:

People needed to understand each other in real time under pressure

And BizCrush worked without:

• extra devices

• extra hardware

• or complicated setup

Why This Matters

For people working across languages — in the field, at events, or in global teams —

The real question isn’t “how advanced is the feature?”

It’s: Does it work where I actually need it? These cases show that it does.

If This Sounds Familiar

If you’re dealing with similar challenges, such as running cross-border events, managing multilingual teams, or operating in environments where communication can’t slow down, we’d love to hear from you. BizCrush is built for real-world communication where things move fast, environments are unpredictable, and understanding can’t wait.

📩 business@bizcrush.ai

Upgrading to a paid BizCrush plan takes only a few steps.

Here is how to upgrade in just a few clicks.

1. Log in to Your BizCrush Account

Start by signing in from the BizCrush homepage. You’ll need to be logged in to access your billing dashboard.

2. Open the Payment & Billing Page

Once you’re in, head to the Payment & Billing section. This is where you can view your current plan and manage upgrades.

3. View Available Plans

On the Billing page, you’ll see a button to explore available plans. Click View Plans to continue.

4. Select Your Paid Plan

Choose the plan that best fits your needs. Click the plan you’d like to upgrade to.

Save 17% when you choose annual billing instead of paying monthly.

⚠️ Note

Annual billing is only available on web — not through the mobile.

5. Complete Your Payment Through Stripe

When you select a paid plan, you’ll be redirected to a secure Stripe payment page. Follow the steps to enter your billing details and finalize your subscription.

That’s it!

Once payment is complete, your account switches to the new plan immediately.

Important: Switching from Mobile?

If you previously subscribed via the Apple App Store or Google Play Store, you must cancel that subscription first to avoid duplicate charges.

1. Cancel your subscription in the App Store or Play Store.

2. Wait for your current billing cycle to end and your account to return to the Free Plan.

3. Once your account is free, follow the steps above to upgrade via the web.

Need more help?

Contact us at business@bizcrush.ai

BizCrush’s Real-Time Subtitle PIP (Picture-in-Picture) Overlay lets you keep live captions (and translation) visible while you work in any app—slides, docs, browser tabs, or online meetings.

Here's a short video showing how to use real-time subtitles.

Or here's a simple visual to get you started.

1. Install the BizCrush Desktop App

PIP subtitles are a desktop-only feature. If you haven't already, head to our website to download the version for your OS.

2. Open the Real-Time Script Panel

Start a meeting and open your live transcript panel to set things up.

3. Set Your Languages

Choose your spoken language and the language you want subtitles translated into.

4. Open Subtitle Menu

Next, open the subtitle menu from the script panel’s top-right area.

5. Customize Your Overlay Settings

The dropdown lets you choose display mode, text size, and how many lines appear.

6. Turn On PIP Subtitles

Once you enable overlay mode, subtitles appear instantly in a floating window.

7. Move the Subtitle Window Anywhere

Drag the overlay to wherever it’s most comfortable on your screen.

8. Use It While Presenting or Multitasking

Your subtitles stay visible on top of slides, browsers, or any app.

Great for presenters, trainers, and meetings.

9. Turn Off Anytime

Turn off the overlay window when you’re done.

Need more help?

Contact us at business@bizcrush.ai

Explore More updates

We’re making BizCrush smarter, faster and more connected every week.

See everything new → Change log

CES moves fast.

booth chats, hallway intros, and partner meetings — great conversations happen, then disappear.

BizCrush is built for this exact environment.

It captures real-world conversations, translates them live, and turns them into clear summary and instant follow-ups.

So no insight is lost.

This is 2-minute setup guide.

Your CES Workflow (short version)

1. Start a meeting room for each conversation (booth chat, partner meeting, quick intro).

2. Record the conversation. Add context keywords or upload a document, so summaries stay relevant.

3. Turn on live translation if needed.

4. Generate a follow-up email instantly and refine it with Ask AI.

That’s it.

Step 1: Install and Log In

Download BizCrush from your App store/Play store

Log in using your Google or Apple account.

Step 2: Capture Every Conversation

Tap the purple record button to start.

Meeting international partners? Tap the 🌐 or open Language Settings in the side menu to enable live translation.

Tips

• Add the BizCrush widget to your home screen for one-tap recording—perfect for spontaneous booth chats.

(Just make sure microphone access is enabled.)

Step 3: Send Follow-Ups Instantly

When the conversation ends, BizCrush automatically

• Organizes your notes

• Generates a summary

• Extracts action items

Tap Follow-up Email to create a ready-to-send draft based on the discussion.

Want to adjust tone or focus?

Use Ask AI

Try prompts like

• "Make it more professional"

• "Mention dinner tonight"

• "Focus on our Q3 partnership"

Learn more about customizing follow-up emails using Ask AI.

Optional: Teach BizCrush Your Context (Highly recommended for CES)

You can customize BizCrush in Meeting Settings.

1. Contextual Keywords

   • Add brand or product terms (e.g., "BizCrush","Sales manager") so they are transcribed correctly every time—useful for booths.

2. Voice Enrollment (30 seconds)

   1. Record a short voice sample so BizCrush can identify speakers accurately in multi-speaker conversations.

CES 2026 Quick Checklist

1. Install BizCrush and log in.

2. Enable microphone access.

3. Turn on multi-language translation mode if needed.

4. Send customized follow-ups immediately.

5. (Optional) Add keywords or PDFs for better summaries.

Ready for CES 2026?

Make every conversation count.

Turn connections into opportunities!

This guide covers just the basics of BizCrush.

Explore more advanced features to get even more out of BizCrush.

Want to use BizCrush for free during CES 2026?

Email us at founders@bizcursh.ai

We are offering free CES access to the first 50 people.

Turn meeting summaries into emails you’d actually send

A good follow-up shouldn’t take 20 minutes to rewrite.

With Ask AI, you can regenerate BizCrush’s auto-generated follow-up emails using simple instructions — tone change, added context, or next steps.

Here’s how it works

Step 1: Open the Follow-Up Email from your meeting

After the meeting, tap Follow-up Email.

In the Private tab, you’ll see a Follow-up Email Suggestion card.

Tap View Details to open the email editor.

💡 Tip: BizCrush uses your meeting summary to craft a relevant first draft automatically.

Step 2: Review the initial draft (Auto-generated)

BizCrush generates a complete email, including:

• Recipients

• Subject line

• Email Body (editable)

• Quick Copy buttons for easy sharing

This draft is designed to be usable.

Step 3: Request changes with Ask AI

At the bottom of the editor, tap Request changes

Type a short instruction, for example:

• “Make it more welcoming.”

• “Add a brief recap + next steps”

• “Make it shorter or more direct.”

• “Rewrite the opening paragraph.”

• “Add context about our partnership goals”

Tap the Send (➤) icon to regenerate instantly.

Step 4: See your revised version

Ask AI applies your instruction and produces a new version, improving:

• tone (friendlier / more confident / more formal)

• clarity and structure

• context and relevance.

Both the subject and body update automatically.

To compare versions, open Version History:

• The original Auto-generated draft

• Rach Ask AI revision (labeled by your request)

You can iterate freely without losing earlier drafts.

Step 5: Choose the best version and send it

Back on the meeting page, you’ll see multiple Follow-up Email versions.

Open the one you like best, then copy or send it using your email app.

Pro Tips

• Be specific: Add 2 bullet next steps” works better than “make it better.”

• Include context when needed (the org, project name, or decision point)

• Example Ask AI prompts:

  • “Confident but not salesy’

  • “Turn the recap into bullet points.”

  • “Mention the demo we discussed.”

  • “Add context about timeline and ownership.”

  • “Include a CTA for scheduling a follow-up.”

TD; LR

1. Open your meeting → Follow-up Email → View Details

2. Review the Auto-generated draft

3. Tap Request changes → type instruction → send (➤)

4. Compare drafts in Version History

5. Choose the best version and send it

Try it now.