LynxTranscribe

Fast, private, offline audio transcription powered by AI

Features • Screenshots • Usage • Building • Architecture • Contributing • License

---

Overview

LynxTranscribe is a cross-platform desktop application for transcribing audio files and recordings using state-of-the-art AI speech recognition. Built with .NET MAUI and powered by LM-Kit, it runs entirely on your local machine - no cloud services, no subscriptions, complete privacy.

Why LynxTranscribe?

• 100% Offline - Your audio never leaves your computer
• Fast - Optimized for speed with turbo and accurate modes
• Private - No data collection, no cloud processing
• Cross-platform - Runs on Windows and macOS

Screenshots

Clean interface ready to receive audio files via drag & drop

Audio file loaded with transcription options: language selection, VAD, and quality modes

Transcription results displayed in segment view with timestamps and audio playback

Features

Core Transcription

• File Transcription - Drag & drop or browse to transcribe audio files
• Live Recording - Record and transcribe directly from your microphone
• Multiple Formats - Supports a wide range of audio and video formats

Supported Formats

Audio	Video
WAV, MP3, FLAC, OGG, M4A, WMA, AAC	MP4, AVI, MOV

Audio is automatically extracted from video files during transcription using Windows Media Foundation.

Smart Processing

• Voice Activity Detection (VAD) - Automatically detects speech segments
• Dictation Formatting - Intelligent punctuation and capitalization
• Multi-language Support - Transcribe in 99+ languages

User Experience

• Segment View - Navigate transcription by time-stamped segments
• Document View - View as continuous formatted text
• Audio Playback - Built-in player with waveform visualization
• Click-to-Seek - Click any segment to jump to that position

Export Options

• Plain Text (.txt)
• Subtitles (.srt, .vtt)
• Documents (.docx, .rtf)

Customization

• Dark/Light Theme - Easy on the eyes, day or night
• Adjustable Font Size - Zoom in/out with Ctrl+Mouse wheel
• Resizable Panels - Customize your workspace
• Language Selection - UI available in English and French

Requirements

• Windows: Windows 10 version 1809 or later
• macOS: macOS 15.0 (Catalina) or later

No additional dependencies required. Video format support uses Windows Media Foundation which is built into Windows.

Usage

Transcribing a File

1. Drag & drop an audio file onto the application, or click Browse to select one
2. Click Transcribe to start
3. View results in segment or document mode
4. Export to your preferred format

Recording Audio

1. Select your microphone from the dropdown
2. Click the Record button (3-second countdown)
3. Speak clearly into your microphone
4. Click Stop when finished
5. Transcription starts automatically (if auto-transcribe is enabled)

Keyboard Shortcuts

Shortcut	Action
Ctrl + O	Open audio file
Ctrl + S	Export transcription
Ctrl + Mouse Wheel	Adjust font size
Space	Play/Pause audio
← / →	Seek backward/forward 5s

Building

Prerequisites

• Windows: Visual Studio 2022 (17.8+) with .NET MAUI workload
• macOS: Visual Studio for Mac or JetBrains Rider
• .NET 10.0 SDK

Clone & Build

git clone https://github.com/user/lynxtranscribe.git
cd lynxtranscribe
dotnet restore
dotnet build

Run

dotnet run --project LynxTranscribe.csproj

Publish (Windows)

dotnet publish -c Release -f net10.0-windows10.0.19041.0 -r win-x64

Publish (macOS)

dotnet publish -c Release -f net10.0-maccatalyst -r maccatalyst-x64

Architecture

LynxTranscribe/
├── Controls/           # Custom UI controls
├── Helpers/            # Utility classes
│   ├── TranscriptExporter.cs
│   ├── WaveformDrawable.cs
│   ├── WhisperLanguages.cs
│   └── ...
├── Localization/       # Multi-language support
├── Models/             # Data models
│   └── TranscriptionRecord.cs
├── Services/           # Business logic
│   ├── AppSettingsService.cs
│   ├── AudioPlayerService.cs
│   ├── AudioRecorderService.cs
│   ├── LMKitService.cs
│   └── TranscriptionHistoryService.cs
├── MainPage.xaml       # Main UI
├── MainPage.*.cs       # Partial classes for organization
└── AppConstants.cs     # Application-wide constants

Technology Stack

Component	Technology
UI Framework	.NET MAUI
AI Engine	LM-Kit
Audio Playback	NAudio
Audio Recording	NAudio
Export	DocX, custom formatters

Configuration

Settings are stored in user preferences and include:

• Model Mode - Turbo (faster) or Accurate (better quality)
• Voice Activity Detection - Enable/disable VAD
• Dictation Formatting - Auto-punctuation and capitalization
• Storage Paths - Custom locations for models, history, recordings
• Theme - Dark or light mode
• Language - UI language preference

Contributing

Pull requests are welcome and will be reviewed by our team.

How to Contribute

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Guidelines

• Follow existing code style and conventions
• Test on both Windows and macOS when possible
• For major changes, please open an issue first to discuss what you would like to change

License

This project is licensed under the GNU General Public License v3.0 (GPL-3.0).

Alternative licensing options are available for commercial use or custom integrations. Please contact us to discuss your needs.

See the LICENSE file for details.

Acknowledgments

• LM-Kit - On-device AI inference SDK
• NAudio - Audio library for .NET
• .NET MAUI - Cross-platform UI framework

---

Made with ❤️ for privacy-conscious users