14:41 <minecrell> z3ntu: be_hw_params_fixup() only sets the format of the backend, i.e. what the DSP outputs to the backends. This is the format configured for the codecs, but unrelated to userspace. I think normally the expectation is the DSP will „reformat“/resample any incoming audio

14:50 <z3ntu> minecrell Backend = amplifier in this case? I was thinking that exactly that stream needs to be 24-bit but aplay'ing 16-bit then makes issue regardless maybe the 16 vs 24 bit problem lies somewhere else?

14:52 <minecrell> z3ntu: Yes, backend is the amplifier in your case (plus the i2s link). I have never really understood where the output format/sample rate is configured in the DSP, that function really just hardcodes it for the codecs (I don’t think this setting is used by the DSP)

14:52 <z3ntu> But I'm also having problems that playing s24le via aplay works "fine" (there's more problems but audio is playing clearly), but I can't get pulseaudio to play back without major distortion. Haven't tried pipewire yet

14:59 <z3ntu> Sometimes I'm wondering if anyone actually understands how the whole ALSA/ASoC system is supposed to work...

18:28 <minecrell> z3ntu: Hmmm those settings might be used by q6afe_i2s_port_prepare(), not sure

18:30 <minecrell> The complexity of ASoC isn’t the only issue, it doesn’t help that there is no real documentation for q6dsp either