Jack quite reasonably does not want to support multiple sound cards. There a issues of synchronisation between two cards as clock skew of as little as one sample per second becomes and audible delay after a few minutes - with an application that targets sample level accuracy that is untenable. No two sounds cards are going to give the same sample rate, so this issue is going to appear whenever multiple cards are used. A few audio devices to allow for this with synchronised or master clocks, but these are not what you would call inexpensive apparatus. PC sound card rarely have a clock input or output to allow for this kind of chaining. _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/