On the OP-Z, in sampler mode if you hit the track selection button it plays a reference tone of A to easily tune/repitch your samples. Does a similar feature exist on the OP-1?
Here’s a DIY approach: find a free spot on the tape, record a short reference tone using an internal Synth engine of your choice, loop the tape portion, press play, go to Sampler and adjust pitch to the looped tone.
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