What about a FM sound module???
Okay, if you're working with sound/audio cards then attend to the ASIOdirect standard. The standard that Phil recommended seems to be the newest once.
Which sequencing software do you use? IMHO Cubase is a good choice.
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Greetings from Frankfurt (Germany),
Sheriff ;-)

[This message has been edited by Sheriff (edited 03-27-2005).]
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Greetings from Frankfurt (Germany),
Sheriff ;-)