Nemotron 3 Speaker Diarization Ported to Apple Silicon via Core ML and MLX
ivan_digital · reddit · 2026-09-25
The maintainer of speech-swift (an Apache-2.0 Swift speech library/CLI) ported NVIDIA's Nemotron 3 Diarization model to Core ML INT8 and MLX INT8 so it runs locally on Apple Silicon for voice-agent use.
Key points:
- Diarization provides a timeline of which anonymous speaker is active, complementing ASR; handles overlapping speech and up to 8 speakers, but doesn't transcribe or identify people
- Quick start: brew install soniqo/tap/speech, then speech diarize meeting.wav --engine nemotron3; add --nemotron3-backend mlx for the MLX backend; the model downloads on first use
- The author asks multi-user voice-agent builders: is the bigger pain speaker label swaps after pauses, or missed interruptions when people talk over each other?
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