AI lecture companion for international students - Real-time translation subtitles for lecture videos, Zoom classes, and online courses.

• Real-time Audio Capture - Captures audio from browser tabs (YouTube, Coursera, Udemy, etc.)
• Speech-to-Text - Uses Deepgram for accurate lecture transcription
• Smart Translation - DeepL with context awareness
• Hyper-Realistic-Text-to-Speech - Uses Elevenlabs to output your preferred language
• Live Subtitles - Beautiful, customizable subtitle display
• Glossary Mode - Maintains consistent translations for technical terms
• Context-Aware - Remembers previous translations for better accuracy

1. Download the Zip file in the Releases
2. Extract the files to a folder (e.g., gatorlator-extension)

Create three icon files in the extension folder:

• icon16.png (16x16 pixels)
• icon48.png (48x48 pixels)
• icon128.png (128x128 pixels)

You can use any image editor or download placeholder icons. The extension will work without them, but Chrome may show a warning.

1. Open Chrome and navigate to chrome://extensions/
2. Enable Developer mode (toggle in top right)
3. Click Load unpacked
4. Select your gatorlator-extension folder
5. The extension icon should appear in your toolbar!

• Deepgram (Recommended)
  • Go to Deepgram Console
  • Create a new API key
  • Copy the key

• DeepL (Best Quality)
  • Sign up at DeepL Pro API
  • Get your API key
  • Copy the key

1. Navigate to offscreen.js in the offscreen folder
2. Enter your API keys in the variables at the top of the file
3. Save the file

1. In the Main tab, select your target language
2. Toggle Enable Subtitles on
3. Click Start Translation

1. Open a lecture video (YouTube, Coursera, Udemy, etc.)
2. Click the extension icon
3. Select your language and click Start Translation
4. Subtitles will appear at the bottom of the video as the lecture plays

• ✅ YouTube
• ✅ Coursera
• ✅ Udemy
• ✅ edX
• ✅ Any website with video content

Audio Capture → Speech-to-Text → Translation → Text-to-Speech → Subtitle Display
     ↓              ↓                ↓              ↓               ↓
  Tab Audio      Deepgram         DeepL           ElevenLabs     On-Screen
  (5s chunks)   (Accurate ASR)   (Context-aware) (Realistic TTS) Subtitles

1. Audio Capture: Captures audio from the browser tab in 5-second chunks
2. Speech-to-Text: Sends audio to Deepgram API for transcription
3. Translation: Translates the transcript using DeepL
4. Text-to-Speech: Converts translated text to speech using ElevenLabs
5. Display: Shows translated subtitles on screen with smooth animations

The extension maintains context across translations:

• Remembers last 10 translations for better accuracy
• Glossary mode for consistent technical term translation

• Web Speech API: Free but less accurate (fallback only)
• Free Google Translate: Limited, less reliable

• Deepgram: ~$0.0045 per minute of audio
• DeepL: ~$0.002 per 1,000 characters
• ElevenLabs: ~$0.18 per 1,000 characters

Estimated cost for 1 hour lecture:

• Speech-to-Text: ~$0.27 (Deepgram)
• Translation: ~$0.10-0.50 (depending on language)
• Text-to-Speech: ~$0.90 (ElevenLabs)
• Total: ~$1.27 - $1.67 per hour

• ✅ No audio storage - Audio is processed in real-time and discarded
• ✅ Local processing - Audio chunks processed immediately
• ✅ No content redistribution - Translations only shown to you
• ✅ Accessibility focus - Designed as learning support tool

Note: Some universities may restrict recording lectures. Always check your institution's policies.

• Chrome Extension Manifest V3
• Web Audio API - Audio capture and processing
• Deepgram API - Speech recognition
• DeepL API - Translation
• ElevenLabs API - Text-to-Speech
• Chrome Tab Capture API - Tab audio capture

This is an MVP. Contributions welcome! Areas for improvement:

• Better error handling
• Offline speech recognition
• More translation providers
• UI/UX improvements
• Performance optimization

MIT License - Feel free to use and modify for educational purposes.

For issues or questions:

1. Check the Troubleshooting section above
2. Review Chrome extension console for errors
3. Verify API keys and quotas

Made for international students who want to learn without language barriers 🌍📚