Hello I have a problem with the tuning of my prophet 6. Even though I set it up by pressing "preset" + "0" it's still out of tune and sounds horrible with my other synth. When I put a tuner on my prophet it says the note is a bit flat... What can I do ?
thank you
Don't be shy about re-running the calibration routine many times. Each time, it will store a new calibration index for the current temp of the synth. (Note: from powering on cold to reaching fully warmed up temperature, that process may take 30 minutes or more, and rise from room temp ~23 celcius / 74 fahrenheit (depending on your room) up to ~58 celcius / 144 fahrenheit. You may want to run the calibration right after it turns on, 15 minutes in, 30 minutes in, 45 minutes in, and an hour after powering on... to set a bunch of calibration indexes that will kick in as the synth warms up.
Best practice for the most stable tuning is to let the synth warm up for a bit before playing, and perhaps just run a new calibration right before you're ready to record or play live.
I made a bunch of observations and recommendations here:
https://www.presetpatch.com/article/Prophet-6-and-OB-6-Tuning-CalibrationAlso, as a side note: This is a VCO synth, so it should be expected that even right after calibration each voice and each oscillator may be +/- 2 cents from nominal, depending on which octave you are playing in. That's just the natural performance variation of VCOs. But if its more than 2-3 cents off, definitely re-run calibration.