Re: [alsa-devel] How to tell user level hardware not support a certain format in a certain sample rate

Richard Zhao wrote:

runtime->hw.rates and runtime->hw.formats indicate the rate and formats hardware can support, so the user level plugins can auto-convert the audio data. But hardware may not support a certain combin of sample rate and format,

Did you install your own constraint rules, as described in section "Constraints" of "Writing an ALSA Driver"?

Best regards, Clemens