RE: [alsa-devel] [PATCH] ASoC: cs42xx8: Remove S32_LE in format list

Hi

On 3/1/19 12:32 AM, S.j. Wang wrote:

quoted

This case is covered by S24_LE I think.  The S32_LE means the data is
32bit and slot width Is 32bit, this is not in data sheet.

The problem is that if you have 32-bit samples in your audio file, and you
want to play them, then software (e.g. alsalib) will need to convert the
audio to 24-bit before sending it to hardware.  This is unnecessary because
the hardware can "convert" the sample to 24-bit automatically by ignoring
the lower 8 bits.

I think a lot of codecs do this already.

Ok. Thanks for reviewing, I will drop this patch.

Best regards
Wang shengjiu