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Prophet 6 grounding noise

Prophet 6 grounding noise
« on: March 21, 2021, 12:54:51 PM »
Hey!

I'm the proud owner of a prophet 6. I'm having a very weird "ground" type noise on the synth.

Examples:

https://youtu.be/11pnf5QReNs

https://youtu.be/JLQmxYoGtmI

I already tried to have it serviced, but my regular "synth guy" did not find the issue.

Of course have no problem with any other synth (including weird modular stuff with debatable quality). I've tried everything, change channels, cables, DI, no DI, changing audio interface, etc...

I'm getting desperate...

Re: Prophet 6 grounding noise
« Reply #1 on: May 15, 2021, 02:53:02 PM »
Try unplugging the USB cable from the Prophet.

I had the same issue and realized I was still getting the noise when the Prophet was powered off, but the channels were un-muted on my mixer. As soon as I unplugged the USB cable, the noise went away. Well, back to the same expected level of any analog synth :)

Hope this helps!