Barry Neilsen wrote:
> any stream I capture from this input ... contains mostly nulls with
> what looks like the occasional valid data point, every hundred or so
> samples.
>
> The exception is Ardour using the ALSA, which captures the entire
> 12 channel stream flawlessly.
>
> What might Ardour be doing to set things up properly and how do
> I replicate this such that the rest of my system does it, too?

Compare the contents of /proc/asound/cardX/pcm0p/sub0/hw_params and
/proc/asound/cardX/stream0 for both cases.


Regards,
Clemens

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