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eh2k / squares-and-circles

squares-and-circles is an alternate firmware for the Eurorack module O_C, targeting Teensy 4.
https://eh2k.github.io/□●/
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issues with DAC calibration #48

Closed lancerotti closed 1 year ago

lancerotti commented 1 year ago

Hi,

I was having some issues with the pitch in the oscillator engines so I decided to go through calibration once more. I'd done it when I had the O_c firmware on it and everything seemed fine at the time.

Now I don't seem to be able to get any less than 2.48V out of the DAC channels when trying to calibrate at 0V.

I have 2 other O_c that I could try the same teensy on and see if the problem persists.

Any idea otherwise?

Thank you in advance Nicola

EDIT: this only happens when using the web interface. I managed to calibrate with the module powered from the case

eh2k commented 1 year ago

Is it possible that in the case described only the Teensy is powered via USB and the module is not fully powered. I think the DACs need the full -12..12V to function properly.

lancerotti commented 1 year ago

Possibly. It's a teensy that I didn't cut the trace of, so it was in fact just powered via USB. But anyway, once calibrated on full -12 +12V it works perfectly Thanks N.