Re: [alsa-devel] what is the difference between SNDRV_PCM_FMTBIT_S24_LE and SNDRV_PCM_FMTBIT_S24_3LE

Zhang wei wrote:

SNDRV_PCM_FORMAT_S24_3LE and SNDRV_PCM_FORMAT_S24_LE.

What is the difference between them?

SNDRV_PCM_FORMAT_S24_3LE stores the 24 in three bytes, and is used only for USB.

SNDRV_PCM_FORMAT_S24_LE stores the 24 bits in the lower bits of a 32-bit word, and is almost never used.

Most devices that support 24 bits use SNDRV_PCM_FORMAT_S32_LE, which stores the sample's bits in the upper bits of a 32-bit word.

Regards, Clemens