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One thing I did find out was using balanced cables with the Kurz is an absolute MUST!!

I suspect most of the noise was coming from the use of unbalanced cables, even though only about 3 feet long and not going anywhere near power cables.

PS: Do you happen to use the Soundtower editor? I am having lots of issues with it "dropping" the USB Midi after a few edits...I am speaking with ST now but all they seem to want to do is find something else to blame I am running the latest Kurz OS, and W7 is 100% UTD!! I even have USB selective suspend set to off as well...



I have the full PC3 not the LE version and I've never had any noise at all but I did have some noise with my new Behringer B208D's that I use for stereo on stage monitoring. I switched to balanced cables and that went away. My main speaker is the EV ELX112P and while I never heard any noise, switching to a 10' balanced cable seemed to give me a bit more power. Not much but I noticed it.

I have the ST editor and it seems to work fine but I'm hardly an expert with it. Some of the pro's over at Sonikmatter say that it's buggy when using it for some deep editing but other than that it works fine. You might want to go over there and do a search before the site goes down forever at the end of the month. A lot of the regulars have already started posting at Keyboard Corner with Kurzweil questions so that may be a good option going forward along with Kurz's Facebook page.

Anyway to your main question I see no need for using spdif.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.