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Grandmother note drift.

Tabletop Semi-Modular Analog Synthesizers

Grandmother note drift.

Postby IAmSoundengine » Sun Jun 30, 2019 6:03 pm

Hey everyone. First post and its regarding my first Moog.

I bought the Grandmother in January, so I've had it for a few months now, but today I noticed when I turned it on and would play a note that just after I would let go of the note the tuning would drift flat about 10-15 cents during the release portion of the envelope. Otherwise it stays relatively in tune during an single note press or long drone.

I will say that the heat today is particularly hot(90-degrees F), and it is the first time I've encountered this at all. It is affecting both oscillators. I already ran through the tuning cycle just a minute ago to no help.

There are no patch cables plugged in, everything is zeroed out or off with the exception of the minimum required to generate a tone.

Any ideas? Or is this just one of those nature-of-the-beast kind of things?

Thank you in advance.
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Re: Grandmother note drift.

Postby ummagumma » Tue Jul 02, 2019 3:26 pm

hmm, to see if it is heat related, you could try running a fan into/onto it for a while, and see if it has any effect?

*edit* well I see there are no vents on the thing!

maybe leave it in front of your A/C
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Re: Grandmother note drift.

Postby IAmSoundengine » Thu Jul 04, 2019 10:42 am

I obviously cycled the power switch once or twice and that didn’t do anything, but when I physically unplugged the power cable from the back and plugged it back in it *seems* to have solved the issue for now. Perhaps there is a ground fault somewhere in my system. :?:
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