When a call is made to:
pxcStatus status = pp->QueryCapture()->QueryDevice()->SetProperty(PXCCapture::Device::PROPERTY_AUDIO_MIX_LEVEL,0.2f);
the status returned is always STATUS_ITEM_UNAVAILABLE. This is with the stock voice_recogniton sample too, not only with my app. Can someone else check their status return in their code and see if you get the same behavior?