Hi Danny! Thanks for your reply!
You inspired me to have another go with ALSA on my BPi and now I've got sound output working at full volume. To get output working at full volume, both 'Power Amplifier DAC' and 'Power Amplifier Mute' have to be unmuted and everything else must be muted. If I unmute anything else the sound cuts out. This has highlighted anoter problem I forgot to mention in my last post and that is I only have one alsamixer playback control with a volume slider (Power Amplifier) and this is the only one that doesn't have a mute control but as I said I can mute audio output by changing the combination of mute options from the one I mentioned before. $ amixer contents numid=2,iface=MIXER,name='Left Mixer Left DAC Playback Switch' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=5,iface=MIXER,name='Power Amplifier DAC Playback Switch' ; type=BOOLEAN,access=rw------,values=1 : values=on numid=6,iface=MIXER,name='Power Amplifier Mixer Playback Switch' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=7,iface=MIXER,name='Power Amplifier Mute Switch' ; type=BOOLEAN,access=rw------,values=1 : values=on numid=1,iface=MIXER,name='Power Amplifier Volume' ; type=INTEGER,access=rw---R--,values=1,min=0,max=63,step=0 : values=62 | dBscale-min=-63.00dB,step=1.00dB,mute=1 numid=4,iface=MIXER,name='Right Mixer Left DAC Playback Switch' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=3,iface=MIXER,name='Right Mixer Right DAC Playback Switch' ; type=BOOLEAN,access=rw------,values=1 : values=off Thanks! On Tue, Jan 19, 2016 at 1:54 AM, Danny Milosavljevic <[email protected] > wrote: > Hi Dan, > > On Mon, 18 Jan 2016 14:32:48 -0800 (PST) > Dan MacDonald <[email protected]> wrote: > > > I recently asked about the status of ALSA audio for the BPi in mainline > on > > the lemaker forums and I was pointed towards this patch: > > > > > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit?id=38e633f3f3756b5630c5eb66042e776d86764296 > > That's correct. > > > Not all of the ALSA mixer > > controls are present and the ones that are seem to be incorrectly > labelled > > so it clearly needs some work yet: > > Which one is incorrectly labeled? > > What does > > $ amixer contents > > say? > > Make sure that you unmute (using the "M" key in alsamixer) only one of > Power Amplifier DAC, Power Amplifier Mixer. If you unmute both, it will > sometimes cause destructive interference. I'd suggest to mute Power > Amplifier Mixer - fewers things that can go wrong. > > Things are unmuted in alsamixer when the box below the slider glows green, > muted when it's transparent and says "MM". > > Note that "Power Amplifier Mute" needs to be unmuted (i.e. green) for your > headphones to work normally. > > > Is anybody here working on the BPi ALSA driver? > > Is there a more complete patch I can test? > > I'm working on a patch for more complete mixing in general - further work > is currently blocked waiting for answers to some technical questions. > > However, I doubt my patches would fix your playback volume problem. I > never had that problem before. The stuff I added is exclusively for > capturing and loopback (so far). > > (If you want to try, search for sun4i-codec posts on this list, by me. It > won't help, though) > > Regards, > Danny > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
