[linux-audio-user] How to get SPDIF working with ALSA and M-Audio 2496

[Hector Centeno-Garcia]

Andrew,

I have an Audiophile 24/96 and SPDIF is working for me. How are you 
testing it? Are you trying to output or input audio? I use it with Jack 
and the envy24control. It depends on what you want to do, but in my case 
I use the SPDIF out to output to my digital monitors and the input to 
receive from a M-Audio Duo that I use as an external A/D converter. 
Because I want to listen to everything coming out from the card through 
the monitors, I set the SPDIF to output the Digital Mix master. You can 
do this by going to the "Patchbay/Router" tab inside envy24control, and 
setting to "Digital Mix L" and "Digital Mix R" under the "S/PDIF Out" 
column for both L and R channels. You have to make sure that the PCM Out 
1 and 2 is not muted and the volume set to the right level inside the 
"Monitor PCMs" tab (it uses a not very standard way of dealing with the 
channels by having two faders per channel instead of one single fader 
and a panning fader, so the way I have it is the right PCM Out 1 and 
left PCM Out 2 faders muted). If what you want is to output directly 
form an audio software to the SPDIF outs then in Jack you have to route 
to playbak_9 and playback_10 (I haven't find a way for alsa to display 
the real number of physical outputs).

If you have any question, let me know! I hope this helps.


Hector


andrew gatt wrote:
> Hello all,
>
> I've been trying to get the spdif output of my m-audio 2496 card for a while
> now. I've played with .asoundrc files given on the alsa website and used the
> envy24 control but i still get nothing. Does anyone have a simple to follow
> step by step guide on getting the spdif to work?
>
> Any help would be really appreciated!
>
> Andrew
>
>