Pitch/Filter Amt Knob vs Mod Wheel , resolution/scaling ?

Hi,

Firmware 1.1.14
Steps:

  • Init preset, edit mod bus 1
  • Set Mod 1 source to ’ constant’, mod wheel amount 100%
  • Turn Pitch amount to right full , push mode wheel slowly up an down: pitch glides smoothly up and down
  • Leave mode wheel in fully up position, and rotate the pitch amt knob slowly from 0 to positive max: especially in the highest regions this is not as smooth as I would expect

Similar effect on the filter amount: close the filter and raise the resonance to hear this clearly by rotating the filter amount knob

Feels like a scaling/resolution difference between knobs and wheel

Regards

Hans

Hi Hans,

I followed your steps and what I find is that if you rotate the Pitch AMT knob from the Editor it would sound as if it goes in steps rather then as smooth as when you rotate the actual knob on the synth, is that what you mean ?

Hi Gil,

This is not editor related: I mean the actual knobs and wheels on the synth. Yes: There is a more step like behavior when you turn the knob instead of the wheel.

Best regards

Hans

Hi Hans,
I did your steps also:
Yes is true. When the pitch amount is on 5 o’clock and you turn to 3 o’clock, There is between 5 o’clock and 4 o’clock no reaction. Suddenly on 4 o’clock the tune is moving up. But lightly in steps.
See picture and hear init preset.
pitch amount.jpg
https://youtu.be/qHrjt1ZBhCM



Greetings Luloop

Hi,

Indeed . This is the issues

Regards

Hans

Hi,

I think it has to do with the new firmware…Not sure…
In any way. just keep calm and carry on and let see what moog says about it.

Regards Luloop

Yes this is true, the mod wheel and the mod Amount knobs are scaled differently, and there is a bit of stepping when adjusting the Amount knob dynamically.

The Mod Wheel is linear and as smooth as it can be. The Amount knob has its values “spread out” near zero and “compressed” towards the outer extremes of the knob.
This is mainly in order to make it easier to dial in very small values for Amount, and also because fine resolution is (generally) less important when the overall Amount is already very high.

This behavior is consistent with earlier firmware versions and I was not planning on changing it… in fact any change would have to be done with care in order not to affect the sound of previously-saved presets.

Amos,

Thanks , makes sense from an interaction point of view. I guess the CV’s are processed the same way as the mod wheel ?

Best regards

Hans

CVs are treated as linear for their default mappings… if you map a CV to a parameter that has some kind of non-linear response, the CV gets the same response (like the knobs, basically-linear input is transformed to nonlinear when mapping to the actual parameter value, if the parameter has a non-linear relationship to its preset value)

Hi,

Just a update. Bernard and me where playing with a scope.
See video.

https://youtu.be/caZAkFodIus

Have a nice day!
Bernard, Luloop

This whole discussion is very interesting!

As I was trying to introduce very light detuning using LFO 2, I was already wishing for the Amount knobs to have a wider range where they allow fine adjustments. Given what Amos mentions above,I wonder whether it would be possible to allow for user adjustable scaling, offering linear and several types of curves e.g. log10.

Or maybe to use the Fine Tune knob to fine adjust the last changed value?

Another idea would be to have the MOD value scaled before being applied to the destination…