Ubuntu
alsa-driver package

  1. Bug #1553685
  2. Comment #21

Comment 21 for bug 1553685

Revision history for this message
Raymond (superquad-vortex2) wrote :

How did you test ?

When there is hardware low pass filter and downmix widget,

Converter: stream=1, channel=0

Subwoofer channel. Is same as speaker

When there is no hardware low pass filter, channel=1
and you need pulseaudio to provide software lowpass filter and downmixing

Node 0x02 [Audio Output] wcaps 0x41d: Stereo Amp-Out Control: name="Front Playback Volume", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Device: name="ALC233 Analog", type="Audio", device=0 Amp-Out caps: ofs=0x57, nsteps=0x57, stepsize=0x02, mute=0 Amp-Out vals: [0x57 0x57] Converter: stream=1, channel=0 PCM: rates [0x60]: 44100 48000 bits [0xe]: 16 20 24 formats [0x1]: PCM Power states: D0 D1 D2 D3 EPSS Power: setting=D0, actual=D0

Node 0x03 [Audio Output] wcaps 0x41d: Stereo Amp-Out Control: name="Bass Speaker Playback Volume", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Amp-Out caps: ofs=0x57, nsteps=0x57, stepsize=0x02, mute=0 Amp-Out vals: [0x57 0x57] Converter: stream=1, channel=0 PCM: rates [0x60]: 44100 48000 bits [0xe]: 16 20 24 formats [0x1]: PCM Power states: D0 D1 D2 D3 EPSS