Yeah, that's definitely it. Nice one! Are you using the original hardware or a VST? Original hardware (Seiko DS250+DS310). I haven't yet found a VST that comes close to that. Yeah, I tried the Castle Instruments DS-250 Kontakt library, which is based on samples. It's a pretty good effort to be fair...

trying to recreate the sounds as closely as I possibly can. I'm 90% sure that the synth used for Fifth Rendez-vous is the Casio CZ5000. Good effort with the CZ. However, Jarre did this track almost entirely with Seiko DS250 + DS310 module. Here's my recreation of this sound using DS250 with DS310. ...

https://youtu.be/0_0X6anVg1Q I got the free trial of the Roland D-50 softsynth so what else could I do but have a go at the entire Industrial Revolution suite?! It took two weeks and my wife almost divorced me. Synths used: Arturia Spark for vintage drum sounds Roland Zenology for noises and percus...

Never mind. Pando below has I think the definitive version of the sound and they used the Seiko DS-250. Still, I got close! I know this thread is really old now but maybe someone can use this information! Because I'm stupid I'm currently doing a cover of every track on Rendez-vous, trying to recreat...