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The OP-1 is a portable music workstation incorporating a synthesizer, sampler, sequencer, multitrack recorder, drum machine, mixer, and controller. It was released in 2011.

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Does my battery need to be replaced? Or is something else going on?

My OP-1 hasn’t kept a charge in over year.

However, up until last week it’s always worked when I plugged it in.

Now it won’t turn on at all.

Is this a battery issue or something else?


Also, while I was previously able to use it when plugged in, it would often give off a constant high pitched hum until I unplugged it and plugged it back in…

Answered! View the answer I have this problem too

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1 Answer

Chosen Solution

Turned out it was the connector port. Easy solution. Battery was fine.

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Daniel Papageorge will be eternally grateful.
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