[sgroup] S-330/S-550 real-time control

Hello, It may be a silly question, but after toying around with more recent gear & knowing how to control that - coming back to the S-330 & S-550 I can't seem to find how to let them respond to MIDI-CC. As it seems they're not really responding to many MIDI-CC numbers but it all has to be done by System Exclusive, right ? Is there for instance no simpler way on these machines to say control the VCF(TVF)-cutoff etc in real-time ? Or no way to control the settings of the multiple-stage Envelope Generators in real-time ? I hope I'm simply overseeing something, but fear I should dive more in the System Exclusive topic... Is that way of controlling also capable of 'zipperless' real-time control ? Thanks ! & regards