mumbleflow
Re:Ask HN: What's the current best local/open speech-to-speech setup?
on Friday February 13, 2026 @06:41PM (#47009403)
+1 on the post-processing point. Raw Whisper output is ~90% there but punctuation, grammar, and formatting are the missing piece.
I built MumbleFlow to address exactly this — whisper.cpp for STT plus llama.cpp for smart text cleanup, all running on-device. Metal/CUDA accelerated, sub-second latency on Apple Silicon. Global hotkey works in any app.
$5 one-time, no cloud, no subscription. https://mumble.helix-co.com