I picked up a second hand big box DMM a few weeks ago. I’m playing it more now and I notice that every time it’s on almost I get a weird chorus glitch in my repeats.

It sounds like someone is moving the chorus knob or delay knob when I am playing and thus making the repeats warble in an out of tune way for a second or so.

It’s starting to get really annoying and I am reluctant to use it at a gig now but when It’s not doing it it sounds great.

Is this a known issue or has anyone else come accross this? Could it be a problem with the power supply – I’m using the EH adapter.

Thanks.