Safe to plug a soundcard into itself?

[One More Solo]

I want to record some a DJ mix which means the outputs of the soundcard are plugged into the mixer, then the output of the mixer into the record/line in of the soundcard? Is this safe? Last time I tried it with my old soundcard it locked the system up and blew one of the channels on the soundcard so obviously I'd like to avoid this.

 

[One More Solo]

You do risk creating a feedback loop, but I don't see why it wouldn't work.

I reckon that's what buggered the first one, really don't want to do it again.

 

[One More Solo]

As long as the line in/mic's output is muted (ie it isn't going out the line out) it should be fine.

Ah, I remember now the mic output wasn't muted on the last card. Any ideas how you mute it on the Audigys?