Comment 23 for bug 1553685

This is the output of the command you provided:

$ aplay -D hw:0 --dump-hw-params /tmp/test_stereo_48000Hz_8bit_PCM.wav
Playing WAVE '/tmp/test_stereo_48000Hz_8bit_PCM.wav' : Unsigned 8 bit, Rate 48000 Hz, Stereo
HW Params of device "hw:0":
--------------------
ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED
FORMAT: S16_LE S32_LE
SUBFORMAT: STD
SAMPLE_BITS: [16 32]
FRAME_BITS: [32 128]
CHANNELS: [2 4]
RATE: [44100 48000]
PERIOD_TIME: (166 11888617)
PERIOD_SIZE: [8 524288]
PERIOD_BYTES: [128 8388608]
PERIODS: [2 32]
BUFFER_TIME: (333 23777234)
BUFFER_SIZE: [16 1048576]
BUFFER_BYTES: [128 4194304]
TICK_TIME: ALL
--------------------
aplay: set_params:1233: Sample format non available
Available formats:
- S16_LE
- S32_LE

So I guess that means there is a max of 4 channels and we need to add a low pass filter in the pulseaudio config? unfortunately I have no idea how to do that... And for me it still doesn't explain why there is no sound coming from my subwoofer. I already have the third channel activated as described in several topics and I see the subwoofer in the settings but there is still no sound...