Re: [alsa-devel] AES/SPDIF channel status bits in ALSA

Dne 8.1.2015 v 14:14 Petr Kulhavy napsal(a):

Hi,

is there a way to get the channel status bits information from an AES or SPDIF input interface through ALSA and read it in userspace? I'm trying to solve some issues with the channel status bits sent from a custom hardware and finding a way to analyse the channel status info.

Look for the IEC958 controls (amixer -c <cardnumber> contents), but most hardware / drivers do not pass this information.

Some hardware is also able to receive the whole spdif frames - look for drivers with SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_* types (like cmipci).

Jaroslav