I'm sure you've tried it already, but just for the record: I've
noticed with one of those sound cards that the slider (on alsamixer)
labeled 'Capture' causes to feed the output back in. It should be
record-disabled (I'm not sure, but IIRC just bringing the slider all
the way down doesn't do the trick) while it is record-enabled by
default(?). I think.
--
_
__ __ (_)___ Michal Seta
/ \/ \ _/^ _|
/ V |_ \ @creazone.32k.org
(___/V\___|_|___/
http://www.[creazone]|[noonereceiving].32k.org