Thanks for the notes... now all I have to do is find some time to try them. :-) At the risk of asking a really silly question, why don't we just change the default probe address for the mcd driver. I know that sound cards tend to give a pretty limited range of addresses, but I've noticed that 0x320 and 0x340 seem to be pretty well supported. (IIRC, 0x340 is either the BSDi or Linux default address for the Mitsumi.) <<<John>>>