Dan Ritter [2015-03-02 16:26:12-05] wrote:
> If you have an alsa output, there is a software mixer. Control it with
> alsamixer, and turn off all the inputs that aren't being used.
ALSA can use to sound devices' hardware mixer but ALSA has its own
software mixer too.
I'm bypassing ALSA's software mixer (dmix module). Here's another way to
explain my ALSA connection:
# ~/.asoundrc
pcm.!dac {
type hw
card 1
}
And music goes to that device:
mplayer -af-clr -ao alsa:device=dac -format s32le music.flac
And there is not much hardware mixer either. Command "amixer -c1" says
this:
Simple mixer control 'Clock 2',0
Capabilities: pswitch penum
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [on]
Front Right: Playback [on]
Simple mixer control 'Clock 2',1
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Those clocks can be turned "on" or "off". The "off" position makes the
sound silent.
I believe this is either a hardware issue or some internal USB driver
issue.
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