I run kx for a soundblaster live on an older PC that gave up its pro soundcards, & I think it's excellent. The functionality is top notch, & it has always been solid for me. I'm not crazy about the UI but it's not aweful. Compared to a pro card the SBLive has a higher noise floor (still sounds fine IMO) and I can't crank the latency quite as low, but still KX project makes the SBLive way better than a cheap card has any business being.
I've been running kX with a Soundblaster Audigy for quite a while now. I use Giga96 v2.54 . I also use Stormdrum and Absynth 2, and can successfully use those together in realtime with Giga in the same composition (though I have had issues with keeping them all in perfect time with each other, which I usually resolve through use of the 'time +/-' in the track view of Sonar). Overall it is a stable enough setup. I occasionally have problems, but not enough to hamper my workflow when composing.
I have old brand hardware - pIII 800, but it works perfectly with Gigastudio - just 40% of processor usage max! Lot of memory & big HDD. So I don't want to change my entire configuration for a pro soundcard. I had AWE64 before, but it’s not GSIF compatible in WinXP I use now & has poor noise floor.
I bought Audigy presupposing it's gsif compatible. But discovered it's not, so my Gigastudio became useless
I just started using KX, removing Audigy drivers first...
It really works And it's really comprehensive! Audigy became GSIF compatible, so I'm really happy Number of Outputs = 8!!! It beats me only - why Creative ceased introducing gsif feature in brand new cards?! >