DrEricFritz

Thanks again Brad! I know of ground loops but I didn't realize it could happen but didn't realize that it would happen with USB. Cool. I'll look around for an isolator!

Jokeyman123, thank you for the thoughtful and very thorough reply! I am trying to use the piano sound (and the many other hundreds) on the CDP220r but there is a persistent buzz that occurs. It's actually pitched at a B. Anyways, I am starting to think it is the 1/8' stereo to two 1/4' L/R that is the problem. I bought a brand new one for this keyboard and the first one I had made noise and so did the replacement - exact same buzzing sound. I connect that to a Focusrite Scarlett and that connects to my computer. Wait a moment, I think Brad is on to something... Brad: HOLY COW. I get no buzzing when I unplug the MIDI! Is there a way to have both plugged in?

On a related note, does anyone have any suggestions for reducing the noise produced by connecting the CDP-220R to a DAW? I got a decent piano sound from a project I am working on, but the noise is really problematic. Any help would be welcome! I would be glad to start another forum too.

Great! I was thinking that was the case, but since it wasn't made explicitly so in the manual, I figure it never hurts to ask. Thank you!

I'm wondering if anyone knows whether or not the CDP-220r can send audio through its USB MIDI interface. I use a Mac and my DAW is Reaper, which does recognize the keyboard as a MIDI controller, but nothing else. I did try plugging the headphones output directly through my audio interface, but from what I have read and subsequently experienced, it has an amp and causes a lot of unwanted noise. Any help or suggestions would be greatly appreciated!