Invert vcf env?

Hi all,
I succeded with my Anushri and it work very well. :slight_smile:
I’ll have to test it’s midi out with my Shruti this week.

Just one question:
Is it possible to do this mods, and invert vcf env?

Thanks to Olivier, Frank and all at MI !

regards

Thanks for the cheers but luckily im not an Employee or Membet of MI. Else id drive Olivier crazy with my everstupid questions and render him unproductive for weeks…,

The VCF modulation is computed in software, so if you don’t mind tweaking the code it’s relatively easy to do. Otherwise, you can build a simple op-amp circuit with a TS912 (so that you get the full voltage range) and two resistors (basic inverting amplifier with a gain of -1) + a switch to bypass it; and put this between the DAC output for the VCF CV and the rest of the board.

Thanks for the idea Olivier.
I will be able ( I think) soon to do theses mods. But I have to better understant the schematics before.

have a nice day…