https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258711
Bug ID: 258711
Summary: New mixer(8) fails to adjust virtual channels
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Keywords: needs-patch
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
$ mpv foo.mp3
$ sysctl hw.snd.verbose=2
$ fgrep -A3 mpv /dev/sndstat
pcm3:play:dsp3.p0[pcm3:virtual:dsp3.vp0]: spd 48000, fmt
0x00201000/0x00200010, flags 0x1000010c, 0x00000023, pid 1585 (mpv)
interrupts 0, underruns 0, feed 119173, ready 6912
[b:0/0/0|bs:8192/1024/8]
channel flags=0x1000010c<RUNNING,TRIGGERED,BUSY,VIRTUAL>
{userland} -> feeder_root(0x00201000) -> feeder_format(0x00201000 ->
0x00200010) -> feeder_volume(0x00200010) -> {hardware}
$ mixer -f /dev/dsp3.vp0
mixer: mixer_open: /dev/dsp3.vp0: Invalid argument
$ mixer.old -f /dev/dsp3.vp3
Mixer pcm is currently set to 45:45
Real example: https://people.freebsd.org/~ariff/utils/appsmixer
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