Hello,
I’ve been using the 2880 for years and recently there has been a humming sound that comes and goes at different times. It is always synced to the tempo the looper is running, so the hum will go up and down with the pitch shift fader.

Sometimes it’s magically not there, but when it is, it’s very annoying. Could it be the CF card? I have used the same one for multiple years.

Any insight would be helpful.
Thanks!