WPF System Tray application that records voice using a hotkey and transcribes it using OpenAI's Audio Transcriptions API, then pastes the text into the focused application.

• Hold-to-talk: Hold Ctrl+Alt+Space to record, release to transcribe
• OpenAI Integration: Uses gpt-4o-mini-transcribe (default) or whisper-1
• Clipboard Paste: Automatically pastes transcribed text via Ctrl+V
• System Tray: Runs silently in the background
• Status Indicator: Visual feedback with audio level meter during recording
• Sound Effects: Audio feedback for recording start/stop
• History: View and copy recent transcriptions
• Secure API Key Storage: Uses Windows DPAPI encryption

1. Go to Releases
2. Download oto-Setup-X.X.X.exe
3. Run the installer
4. Launch oto from Start Menu or Desktop

No .NET runtime installation required - the application is fully self-contained.

git clone https://github.com/ikumasudo/oto.git
cd oto
dotnet build
dotnet run --project src/oto.App

• Windows 10/11 (64-bit)
• OpenAI API Key
• .NET 9.0 SDK (only for building from source)

1. First Run: Right-click the tray icon > Settings > Enter your OpenAI API Key
2. Recording: Hold Ctrl+Alt+Space to record
3. Release: Release the keys to stop recording and transcribe
4. Result: Text is automatically pasted into the focused application

Right-click the tray icon and select Settings to configure:

oto/
├── oto.slnx
├── src/
│   ├── oto.App/           # WPF UI, System Tray, Settings
│   ├── oto.Core.Audio/    # NAudio recording, WAV encoding
│   ├── oto.Core.Hotkey/   # Global keyboard hook (WH_KEYBOARD_LL)
│   ├── oto.Core.OpenAI/   # OpenAI API client
│   └── oto.Core.Paste/    # Clipboard + SendInput
└── README.md

1. Open Settings > Apps > Apps & features
2. Find oto and click Uninstall

Settings are stored in %APPDATA%\oto\ (delete manually to remove all data).

MIT License