Yes, that is likely.
If you could find out what synth is being used @ThaPST , it would make it much easier. As those early analogs were much more limited in terms of modulation, knowing which synth would probably make it more of a no-brainer.
Very true... sometimes unique sounds that come out of one synth easily can be harder to reproduce on another. When I perform the above OSC 1 sync test on the Prophet10, the basic characteristics show through immediately. But then when I do same on the Rev2 or AS-1 (monophonic P6 basically), I get very differnet results on each of the three synths for this particular sound.
This sound definately sounds like someone is playing the LFO realtime with a fixed max range (i.e. modwheel max amount). On the Rev2 I got something that sounds (sort of) like it by using the mod matrix to map modwheel to both LFO1, with amount around 39 or so, and also directly to OSC1 Frequency, giving it kind of an exponentially weird increase with each stroke of the modwheel up to a fixed amount (all of this assumes OSC1 is already sync'd to OSC2, OSC2 is put into the appropriate pitch etc).
The general nature of the sound I hear coming out of the P10 is a little closer but harder to describe how to reproduce (no mod matrix or exact values to report), but I think the band was known for lots of Prophet 5 use so that may have been what was used.