Bobby,
ASIO works relatively well when you're using software synths. For instance, DXis and VSTis you would want to use ASIO with, so that you can play them in real time. Otherwise, you're going to have horrible lag, half a second or more from the time you press the key until you hear the first note.

Now, with WDM or MME drivers, you're not using a software synthesizer. So, you play Real Band tracks back, and you play you Ketron or Guitar into RB to record alongside of those tracks. That's all real time. You don't have to worry about computer processor slowing stuff down.

Mac can give you a better insight into it. I use ASIO when I have to, WDM when I don't.

Gary

I'm blessed watching God do what He does best. I've had a few rough years, and I'm still not back to where I want to be, but I'm on the way and things are looking far better now than what they were!