https://wiki.ubuntu.com/Audio/AlsaInfo
this seem Mic boost only gain and no attenuation
Node 0x08 [Pin Complex] wcaps 0x41040b: Stereo Amp-In
Control: name="Internal Mic Capture Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="Internal Mic Phantom Jack", index=0, device=0
Amp-In caps: ofs=0x00, nsteps=0x02, stepsize=0x27, mute=0
Amp-In vals: [0x02 0x02]
Pincap 0x00000020: IN
Pin Default 0x90a60030: [Fixed] Mic at Int N/A
Conn = Digital, Color = Unknown
DefAssociation = 0x3, Sequence = 0x0
Pin-ctls: 0x20: IN
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Delay: 1 samples
Node 0x06 [Pin Complex] wcaps 0x41048b: Stereo Amp-In
Control: name="Mic Capture Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="Mic Jack", index=0, device=0
Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
Amp-In vals: [0x03 0x03]
Pincap 0x00001724: IN Detect
Vref caps: HIZ 50 GRD 80
Pin Default 0x04a1103e: [Jack] Mic at Ext Right
Conn = 1/8, Color = Black
DefAssociation = 0x3, Sequence = 0xe
Pin-ctls: 0x24: IN VREF_80
Unsolicited: tag=02, enabled=1
Power states: D0 D3 EPSS
Power: setting=D0, actual=D0
Delay: 1 samples
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https://bugs.launchpad.net/bugs/1248622
Title:
[Inspiron 5323, Cirrus Logic CS4213, Mic, Internal] No sound at all
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