On Wed, 2016-12-21 at 14:54 +0000, peterten01 at yahoo.com wrote: > Hi, > > I'd like to provide an ALSA driver which is designed to support > pulseaudio by default (if that is possible). > The driver works fine with aplay and alsamixer. It provides 6 > channels and volume controls. > - One 'Master Playback Volume' (Mono) > - One 'PCM Playback Volume' (6 channels) > > However, when I want to add an alsa-sink in pulseaudio the hw volume > is not used. > > I call: > pacmd load-module module-alsa-sink device=hw:2 control='MOST Mixer' The control parameter is expected to be a volume (and/or switch) element name, but according to your description there's no element named "MOST Mixer". If you don't want to use module-udev-detect for autodetection, I would recommend loading module-alsa-card rather than module-alsa-sink. The default configuration uses module-udev-detect, and that loads module- alsa-card instances, so if you test with module-alsa-card, that will be closer to how the end users will use the hardware. If you load module-alsa-card (or change control="MOST Mixer" to control=Master), you should get the Master volume in use, but the PCM element will be ignored, because pulseaudio doesn't currently support volume elements with more than 2 channels. If you want pulseaudio to also control the PCM volume, you'll need to either add support for 6- channel volume elements, or change the driver to split the PCM element into separate PCM Front, PCM Rear, PCM Center and PCM LFE channels, assuming that that's how the 6 channels are assigned to speaker positions (the center and lfe channels could also be merged into a single PCM CLFE element). Pulseaudio doesn't currently have configuration for elements with these names, but adding the configuration is easier than writing code for supporting 6-channel elements. -- Tanu https://www.patreon.com/tanuk
