I use the original Sonica with my G4. It's output only and the sound it puts out is pretty nice. The digital out is a nice advantage. The only issue I've had is getting the Dolby Digital out to work properly with their DVD player but I don't think my software is completely up to date. I don't know if I would call it a "pro-audio sound card," but I feel it's a definite improvement over a soundblaster especially if you own a Mac. Hope that helps...