Anushri VCF calibration : self-oscillation tone change when i play same note on keyboard [solved]

Hello,
I 'trying to do the vcf calibration.
LFO and envelope are disable on filter cutoff : “vcf env” and “vcf lfo” pots to its minimal position …
But self-oscillation tone change as if I was playing different notes on keyboard … but i play the same piano key !
It must be something I forgot !?

You probably have some velocity->cutoff mapping.

Almost 2 hours of research for me and … you were right
Thank you again ! And … good night :slight_smile: