@nazokiyoubinbou I'm taking audio from the line out jack on the soundcard, not the amplified speaker jack. Just double-checked to confirm in fact. It could easily be just too much drive going into the capture card though. I'll fiddle with my levels next time I record something. I wanted the drive to be high to overcome the VGA noise but I might have overdone it.

AFAIK the #Dreamblaster doesn't have a volume adjustment, but maybe I missed something?