Hello!
i found that with my a4, if i bring the filter to self-oscillation, the pitch of the resulting sine wave is slightly different for each voice, if i copy the sound from one track to the others.
This is more appearent with the multimode Filter, here it is around 2 semitones difference.
is that something with would be fixable by doing a calibration?
is it safe to run the calibration anyway?
Thanks,
David
Have you tried to put Osc 2 in retrig > so it has the same Osc; start -fase every hit. - or by turning the Osc -drit OFF ? don’t know if that’s the reason do 
Incoherent tuning between different voices can usually be solved by running a calibration. Ensure that you have had your machine powered on for at least 2 hours prior to running the calibration.
doesnt have something to do with the oscillators… if i take the init sound, disable osc 1,open the filter2 a bit, crank up the filter 2 resonance until it self oscillates… this pitch is different. Actually just on Track 4.
ah, ok … i will try calibration this evening then 