[VAD] Auto/Hybrid uses Left Audio Channel only

Hi,

when using VAD in hybrid or auto mode only left channel is considered for speech/volume detection.
This means that with Stereo Audio interfaces you cannot use hybrid mode on the right channel microphone.

I did test this with Pipewire (pipewire-pulse).

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You are right. Speaking is only possible with left channel in these modes.
I could reproduce this by using god old stereo mix and audio files where only one channel was used.

Thanks for the report.

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