On Thu, 10 Jan 2019 05:44:31 +0100, Robert M. Riches Jr. wrote: > > (I sent this first to alsa-user and was instructed to send it to > alsa-devel, as well.) > > With a new OS installation on a pre-existing machine, some of the > USB audio devices now have only 1.00 dB of playback volume > adjustment, which of course is not enough to be terribly useful. > > The affected USB devices show up as "Audio Advantage MicroII" in the > output of "aplay -L". From LSB, they show up as these: > > Bus 001 Device 004: ID 0d8c:0103 C-Media Electronics, Inc. CM102-A+/102S+ Audio Controller > Bus 001 Device 003: ID 0d8c:0103 C-Media Electronics, Inc. CM102-A+/102S+ Audio Controller > > I just installed Devuan Ascii on the machine. It's running kernel > 4.9.0-8-amd64 and alsa-utils version 1.1.3-1. It's a very old kernel. Please try more recent kernel. Some fix for this chip was already merged a few months ago. thanks, Takashi > Doing "amixer -c 1 > contents" or "amixer -c 2 contents" shows this for playback volume: > > numid=3,iface=MIXER,name='PCM Playback Volume' > ; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0 > : values=0,0 > | dBminmax-min=-1.00dB,max=0.00dB > > and > > numid=3,iface=MIXER,name='PCM Playback Volume' > ; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0 > : values=77,77 > | dBminmax-min=-1.00dB,max=0.00dB > > It looks like I'm running kernel 4.9.0-8-amd64 and alsa-utils > version 1.1.3-1. > > Using alsamixer to run the controls from end to end, I cannot > perceive any difference in volume level. > > In contrast, the other device I use (either HDA Intel or HDA NVidia) > has around a 60dB range according to amixer, and running the control > in alsamixer from end to end has a huge range of gain. > > Previously, the exact same hardware was running Debian 7/Wheezy and > then Slackware 14.2. With both those operating systems, the USB > sound devices had a very adequate volume control range, certainly a > whole lot more than 1dB. > > Being as the USB sound devices are the ones my wife uses, I'd be > extremely grateful if somebody could point me a to way (if one > exists) to a usefully greater range of volume control. Any > suggestions? > > Assuming this qualifies as a bug, what channel should I use to > report it so it can be queued to be fixed? > > Thanks, > > Robert > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
