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Metropolis Calibration for AUX v/oct question


#1

What are good sources to calibrate with when you are not sure what sources output what kind of voltage?
I thought my Arp Odyssey Keyboard might be a good 0-1v source but its all up to 12v when i measure with a meter.

Any guidance here? The inputs don’t appear to react much right now without calibration.


#2

I think the CV out from the Odyssey should work? The lowest possible key and then one octave up from that. You would need to measure it to be sure.


#3

Are there other Intellijel modules I can use for calibration in place of a triatt or quadratt?

In the youtube video for the metropolis update 1.30 it mentions that you can use a micro scale and a quadratt to calibrate, but I currently don’t own a triatt/ quadratt, just he micro scale. Thanks


#4

Do you have any other module that can provide a fixed offset into the µScale? Or do you have another generator of quantized voltages such as a MIDI-CV module or Keystep etc?


#5

Not sure about modules with fixed offset, I don’t have a keystep but I do have a microbrute and minibrute which can send gate / pitch out on the back panel, could something like that work?


#6

Yeah that should work, you just need to figure out which key corresponds to 0V and which one to 1V (they should be 1 octave apart)


#7

Cool thanks Kamil, I’ll give that a try when I get home :slight_smile:


#8

You mentioned that you have a micro scale, so if you have only C selected and no other notes you can be sure you’re sending some multiple of 1v.