Heh, I wrote a VAD from scratch when I was working at Sonos. Wasn't that different from any of these implementations. You can add some basic spectral analysis

Heh, I wrote a VAD from scratch when I was working at Sonos. Wasn't that different from any of these implementations. You can add some basic spectral analysis and make it even better, with minimal latency implications. "Cepstrum" and "spectral entropy" are some valuable search terms to apply to this.