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VibeVoice 1.5B, a long-form multi-speaker TTS model, is now supported in audio.cpp, a native C++/ggml runtime, achieving 4.08x real-time speed on RTX 5090, 2.86x faster than Python baseline without quantization.
Microsoft released VibeVoice, an open-source model that processes a full hour of audio in one pass and returns a structured transcript with speaker identification and timestamps, disrupting paid transcription services.