[alsa-devel] Custom card returns "arecord: main:722: audio open error: Invalid argument"

[Clemens Ladisch]

Rob Nertney wrote:
> static struct snd_pcm_hardware my_pcm_hw =
> {
>   .info = (SNDRV_PCM_INFO_MMAP |
>       SNDRV_PCM_INFO_BLOCK_TRANSFER |
>       SNDRV_PCM_INFO_MMAP_VALID),

You must set one of INTERLEAVED, NONINTERLEAVED, or COMPLEX.
(And a single channel should be marked interleaved.)


Regards,
Clemens