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Fast dictation.
No subscription.

Turn speech into text with local voice models or your own OpenRouter key.

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Source code + updates included.

Murmur listening bar with voice levels and a stop button
Murmur ready for on-device dictation with Moonshine Medium and local Clean up writing mode

Transcribes
as you speak.

Moonshine processes your voice while you talk. Murmur loads the model in the background and keeps it ready between recordings. No audio upload in local mode.

18ms

First prepared model start

Native engine test on one Mac. Excludes microphone startup, file verification, and text insertion.
Test details

Moonshine Medium: 186 ms background preparation, 18 ms first prepared stream start, and 0.09 ms for the next stream. Development test, September 4, 2026. These are engine timings, not end-to-end dictation latency.

Hold to talk
Hold your shortcut to speak and release to finish, or use toggle mode. Escape cancels.
Verbatim or Clean up
Keep the model’s original words, or remove hesitation sounds and tidy spacing and capitalization locally. Your original stays available.
Your shortcuts
Record your own key combinations. Copy text, insert into the focused field, or do both on Mac and Windows.
Paste last transcript
Missed the right text box? Focus it and use a separate shortcut to paste your last result—even with history off.
Searchable local history
Find and copy past transcripts. Choose a limit from 100 to 5,000 entries, or turn saved history off.
Menu bar or Dock
Keep Murmur in the menu bar, Dock, or both. Closing the window keeps it ready. Windows has tray and taskbar controls.
Murmur on-device model manager with Moonshine Medium, Moonshine Small, and Nemotron English
Three English models. Pause or resume downloads; each is checked before use. Dictate offline.View 4K
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