Hi,
I may be completely wrong, but my current understanding of ALSA is that it
manages streams of data. ALSA seems to sit between software and hardware, with
streams passing through ("down" to hardware if playing sound, "up" from hardware
if listening, for example). I can use dmix to merge streams going "down" and
dsnoop to merge streams going "up".
But I can't work out how to make a stream loop back so that it enters and leaves
on the same "side" of ALSA. For example, if I have some software playing music
from a file, I can route that down to hardware OK. But I can't seem to route it
back to software so that some other program can read it from ALSA in the same
way that program would read, say, data coming in via a soundcard inputs.
This seems absolutely basic, so I think I am missing something really obvious.
One way of describing it would be an ALSA "loopback".
How do I do this, please?
Thanks,
Andrew
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