Synth help!!

Synth help!!

Hey guys, so I’m producing my first deep house track and I’m constructing my chordsss with VST Polysix.

My question is, without fiddling with any of the parameters, the cut off frequency on the keys change from low to high, why?

For example, if I keep on pressing C3, the cut off frequency will gradually increase then suddenly drop and start again. I can’t get a consistent rhythm without it ascending and descending, why is this?

I am not familiar with that VST. However, based on what you said, I’m assuming there is a LFO modulating the cutoff.

My guess is you have an envelope on the cutoff

Or an lfo or something filtering the sound. could be a phaser or a filter.