it sounds as if the vca is not closing properly - nb I don't have any of these modules

try taking the vca out of the patch - try gate from keystep straight into the vca cv input... does that behave as expected - ie when you press a key the note starts and when you release it the note ends? remember a gate is a type of envelope that just goes fully on, sustains (whilst the key is pressed, in your case) and then off again

if this is working what happens when you ignore step 4 above and then manually trigger the envelope with the button on ceis?
-- JimHowell1970
Upon further investigation I think you're right. I connected the gate from the KSP into the cv input of the VCA, output of VCO (saich) into VCA input. VCA stays open with the signal from Saich, note on and note off from the KSP works, but it's on top of the open signal from Saich. If I reverse this and connect KSP gate to VCA input, and VCO output to VCA cv input, no open signal from saich and note on works, but when I release the key note on happens again... hope that makes sense