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Speaker Diarization and VAD on Apple Silicon — MLX-Native Models
Three MLX-optimized models for on-device speaker diarization and voice activity detection, running natively on Apple Silicon via https://github.com/ivan-digital/qwen3-asr-swift:
- aufklarer/Silero-VAD-v5-MLX — Streaming VAD, 309K params, ~1.2 MB. Processes 32ms chunks at 23× real-time on M2 Max.
- aufklarer/Pyannote-Segmentation-MLX — Multi-speaker segmentation, ~1.49M params, ~5.7 MB. 7-class powerset output for up to 3 simultaneous speakers.
- aufklarer/WeSpeaker-ResNet34-LM-MLX — Speaker embedding, ~6.6M params, ~25 MB. 256-dim L2-normalized vectors with BatchNorm fused into Conv2d.
Together they form a diarization pipeline: pyannote segments → WeSpeaker embeds → agglomerative clustering links speakers across the recording. ~32 MB total.
The library also includes ASR, TTS, multilingual synthesis, forced alignment, and speech-to-speech (PersonaPlex 7B). Apache 2.0.
Full architecture details: https://blog.ivan.digital/speaker-diarization-and-voice-activity-detection-on-apple-silicon-native-swift-with-mlx
Library: https://github.com/ivan-digital/qwen3-asr-swift
Three MLX-optimized models for on-device speaker diarization and voice activity detection, running natively on Apple Silicon via https://github.com/ivan-digital/qwen3-asr-swift:
- aufklarer/Silero-VAD-v5-MLX — Streaming VAD, 309K params, ~1.2 MB. Processes 32ms chunks at 23× real-time on M2 Max.
- aufklarer/Pyannote-Segmentation-MLX — Multi-speaker segmentation, ~1.49M params, ~5.7 MB. 7-class powerset output for up to 3 simultaneous speakers.
- aufklarer/WeSpeaker-ResNet34-LM-MLX — Speaker embedding, ~6.6M params, ~25 MB. 256-dim L2-normalized vectors with BatchNorm fused into Conv2d.
Together they form a diarization pipeline: pyannote segments → WeSpeaker embeds → agglomerative clustering links speakers across the recording. ~32 MB total.
git clone https://github.com/ivan-digital/qwen3-asr-swift
cd qwen3-asr-swift && swift build -c release
.build/release/audio diarize meeting.wav --max-speakers 4 --json
.build/release/audio vad-stream recording.wavThe library also includes ASR, TTS, multilingual synthesis, forced alignment, and speech-to-speech (PersonaPlex 7B). Apache 2.0.
Full architecture details: https://blog.ivan.digital/speaker-diarization-and-voice-activity-detection-on-apple-silicon-native-swift-with-mlx
Library: https://github.com/ivan-digital/qwen3-asr-swift