A few weeks ago my Krisp trial ended and noise cancellation switched off in the middle of a call. I went looking for an open-source alternative on macOS and there really isn't one. The good open tools (NoiseTorch, EasyEffects) are all Linux-only.
So I built Sotto. It adds a "Sotto Microphone" that you pick in any call app (Zoom, Meet, Teams, Discord, OBS). It cleans your mic with DeepFilterNet3 running entirely on your device, ships its own audio driver so there's no BlackHole/virtual-cable setup, and sends nothing to the cloud no account, no subscription. It's MIT-licensed. It's an early developer preview, but it works end-to-end and runs at ~4% CPU. I'm launching it here on Product Hunt soon and would genuinely love feedback before and during.
Sotto removes background noise from your microphone in any macOS call app — Zoom, Google Meet, Teams, Discord, OBS. It runs DeepFilterNet3 entirely on your device, ships its own audio driver (no virtual cables), and needs no account or cloud. Free and
open source (MIT). A no-subscription alternative to Krisp's core feature.
