can’t be done - however, as you have to plock seq velocity values (or record from midi) then you’re already manually programming them (except w midi) so why not just manually program some linear values and modulate something with that info - that’ll cost you three cv outs if you want gate/pitch/vel - velocity mod is not a big talking point in cv land, there are simpler ways to get more variety at the expense of nuance - if you do vel as source it in the A4 it’ll be disconnected from the pitch track, so a pain to program synchronous trigs - but if you’re using cv in a more unconventional way then ignore all of that and just have fun !