https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?id=5ccc618fee67f0f0b2122dd4b32a02fd2b6a1569
+ * AD1984A = AD1884A + digital-mic
0x20Analog Mixer
Mixes individually gainable analog inputs
0x21Mixer Output Atten
Attenuates the analog mixer output to drive the port mixers
pcm playback volume is the volume control input from audio output 0x03 /
0x04 into the analog mixer
Node 0x20 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Control: name="PCM Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=5, ofs=0
Control: name="PCM Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=5, ofs=0
Control: name="Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="Internal Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="Internal Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="Dock Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=4, ofs=0
Control: name="Dock Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=4, ofs=0
Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x0d 0x0d] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
[0x97 0x97] [0x97 0x97]
Connection: 7
0x14 0x15 0x16 0x1a 0x25 0x03 0x04
Node 0x21 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
Control: name="Master Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Control: name="Master Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=1
Amp-Out vals: [0x1b 0x1b]
Connection: 1
0x20
you can record what you are playing when you select 0x20 as the input source
similar to
https://bugzilla.kernel.org/show_bug.cgi?id=70011
Node 0x0c [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
Control: name="Capture Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Control: name="Capture Switch", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x27, nsteps=0x36, stepsize=0x05, mute=1
Amp-Out vals: [0x2f 0x2f]
Connection: 6
0x14 0x15* 0x16 0x20 0x25 0x17
** Bug watch added: Linux Kernel Bug Tracker #70011
http://bugzilla.kernel.org/show_bug.cgi?id=70011
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https://bugs.launchpad.net/bugs/1254884
Title:
Pulseaudio: incoherent muting of GStreamer channels (mutes master,
headphone and speaker, but unmutes only master)
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