AFAIK the pin for the subwoofer output is 0x17:
see this section of my alsa-info.txt attachment:
Node 0x17 [Pin Complex] wcaps 0x40050c: Mono Amp-Out
Control: name="Bass Speaker Playback Switch", index=0, device=0
ControlAmp: chs=1, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00]
Pincap 0x00000010: OUT
Pin Default 0x40000000: [N/A] Line Out at Ext N/A
Conn = Unknown, Color = Unknown
DefAssociation = 0x0, Sequence = 0x0
Pin-ctls: 0x40: OUT
Power states: D0 D1 D2 D3 EPSS
Power: setting=D0, actual=D0
Connection: 1
0x0f
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https://bugs.launchpad.net/bugs/1553685
Title:
Lenovo Y700-17ISK subwoofer doesn't work
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