The Official Sequential/DSI Forum

pitch instability

pitch instability
« on: October 29, 2021, 07:02:47 PM »
I have a new OB-6 when I first received the unit I calibrated the pitch manual + 0 button
a few days later the pitch has become completely unstable varying many pitches when holding down a key.
This worries me that the unit is flawed? I understand oscillators drift with Temperature , this is not just drift this is crazy varying pitch. I don't think I should have to calibrate unit every time I use it isn teh exact same temperature controlled studio? Just curious if anyone else has had this problem before I exchange?

Re: pitch instability
« Reply #1 on: October 30, 2021, 07:09:04 PM »
Run calibration again after itís warmed up.

Re: pitch instability
« Reply #2 on: October 31, 2021, 05:30:54 AM »
I'm sure there's a more detailed explanation elsewhere in the forums but there is most likely nothing wrong with your unit. This is normal behaviour as you need to calibrate over several sessions in order for the OB-6 (and other Sequential analog synths btw) to build up its tuning tables at different temperatures. It took mine about a week to stabilise. All of this is covered on page 65 of the manual.