Random pitch shifts on OB6

Random pitch shifts on OB6
« on: July 28, 2022, 02:07:01 PM »
This mainly happens within the first 10-15 minutes as the synth is warming up. As I'm playing, the entire pitch range shifts up or down a few steps. It's not just one or two keys... the whole keyboard is affected. Everything sounds in tune together, and then whammo... I'm in another key. It happens regardless of the patch I have selected, so LFOs don't seem to be the problem. Any help is much appreciated!

Re: Random pitch shifts on OB6
« Reply #1 on: August 02, 2022, 07:28:13 AM »
Any significant temperature change in your environment since you last calibrated? Happens with mine too, the warmer weather will do it, try re-calibrating.

Re: Random pitch shifts on OB6
« Reply #2 on: August 10, 2022, 07:01:32 PM »
Any significant temperature change in your environment since you last calibrated? Happens with mine too, the warmer weather will do it, try re-calibrating.

Not really. I keep the studio between 76-78deg usually. This happens every single time I turn it on. Tonight for example, within the first 5 minutes of playing, it jumped down a full step, then after a couple minutes back up a full step. Is it possible something is loose inside the unit? What would I look for?

I updated to 1.7.4 tonight, and although it had been on for ~30 minutes, after recalibration my tuner said it's about 9 cents low across the board. I also made sure to unplug the expression pedal and all midi/usb to make sure nothing plugged into it was somehow modifying the pitch. I love this synth, but this problem is killing it for me.
« Last Edit: August 10, 2022, 07:18:43 PM by JoeFuture »

Re: Random pitch shifts on OB6
« Reply #3 on: August 11, 2022, 08:54:31 AM »
Update: I apparently has Master Tuning turned down -11, so after correcting that it's at least in tune after I calibrate the oscillators. Will pay attention to see if pitch is still drifting after the OS update.