I Built a Headless Speech-to-Text Tool in Rust — Meet Voicr

Most speech-to-text tools assume you want a GUI. A tray icon. A settings panel. I didn't. I wanted something that runs in the background, takes commands from a socket, and types out whatever I just said. No window. No Electron. Just a binary.

That's Voicr.

What It Actually Does

Voicr is a terminal-first STT tool written entirely in Rust. You run it as a daemon, send it commands over a Unix socket, and it transcribes your mic input. Or you skip the daemon entirely and do one-shot transcriptions:

voicr transcribe --auto-stop

That's it. Records until silence, prints the text, exits.

The daemon mode is where it gets useful. Start it once:

voicr daemon &

Then toggle recording from anywhere:

voicr send toggle   # start
voicr send toggle   # stop + transcribe

I have this bound to Super+Space in my hotkey daemon. Press once to start, press again to get the text. That's the whole workflow.

Why Rust

Partly because I wanted the challenge. Mostly because I needed a single binary I could drop on any Linux machine without worrying about runtimes or virtual environments.

The audio handling and ML inference are built on top of transcribe-rs. I handled the daemon protocol, socket layer, history storage (SQLite), and the CLI on top of it.

Model Options

Voicr supports several models depending on what you need:

• Moonshine (31MB to 192MB) for fast, low-latency transcription
• Parakeet V3 (478MB) is the recommended starting point, good accuracy, fast enough
• SenseVoice (160MB) if you need multilingual support
• GigaAM v3 (225MB) for better accuracy at a reasonable size
• Whisper variants if you want the familiar option (requires Vulkan at build time)

You set your model once and forget it:

voicr model download parakeet-tdt-0.6b-v3
voicr config set model.selected parakeet-tdt-0.6b-v3

If you're on a machine with limited RAM, there's an unload_timeout setting that drops the model from memory after a few minutes of inactivity.

The Part I Use Every Day

The hotkey integration. With sxhkd on Linux:

super + space
    echo '{"cmd":"toggle"}' | nc -U /tmp/voicr.sock

Pair that with xdotool to auto-type the transcription wherever your cursor is:

nc -U /tmp/voicr.sock | while IFS= read -r line; do
  text=$(echo "$line" | jq -r 'select(.type=="transcription") | .text')
  [ -n "$text" ] && xdotool type --clearmodifiers "$text"
done