*** The following section is primarily intended for Kronos Jump users like jok3r, although it also applies to any synth.***
Here's a few techniques I've learned in the ridiculous quest for "that" classic OB Jump sound.
-- Use a thick plate or spring reverb on the main right-hand synth brass sound. Listen to the original song, the reverb is definitely a defining characteristic here. There is a bit of spacing between the sound and the onset of the reverb. On the Kronos I used Reverb Dry Plate (1 sec, 50% damp) and around 80ms for the pre-delay (50% thru).
-- Like others have noted, the main brass benefits from the typical pitch blip for synth brass patches. On the Kronos I've set each AL-1 engine where the velocity affects the pitch envelopes slightly differently compared to each other. Playing harder (intro and outro) increases the brassiness as well as the volume this way.
-- The lower bass saws sound is very big, and deserves to be its own separate program. Its amp and filter decays are very long, over a couple measures, but it does fade down and not stay at full volume the whole time.
-- If you slack on the bass saw, the song can suffer. For example, after you think you've nailed the high saw part, try substituting various saw bass sounds, and see how the whole impression changes. Also, if you have no bass player pumping the eighth notes, it will become apparent very quick just how mechanical/digital the bass sound is. Analog bass ftw, but if none available, pay close attention to the bass sound attack and punchiness over repeated eighth notes. Of course, bump up the low and low mid to give it the beef it needs to support the song. But, don't neglect the sizzle either.
-- The pre-chorus and pre-solo sections also deserve their own programs. The song is already overly repetitive by nature, and if you don't break that up for the various song sections, but instead choose to only use the same sound for the whole song, you will lose that dynamic contrast that makes live music so enjoyable.
-- You can use the Dynamic Comp to bump up the volume for the brass patch keyboard solo, kind of like how a guitar player uses his boost pedal for solos. Assign the Comp to Switch 1, and you can toggle the solo volume as needed.
-- Use the Kronos Multiband Compressor and Mastering Limiter on TFX 1 and 2 to smooth out and bump up the whole combi.
-- Most of the above of course should not be needed with really good, juicy analog goodness. It was much quicker and easier, with the results far more pleasing, to dial up the secondary sounds on my Rev2 than it was on either the Kronos or Integra. I am still working on the main Jump sounds as we speak. First drafts of "I'll Wait" was also fruitful, with Subdivisions, Power of Love, Separate Ways, and Uptown Funk on the list. Hopefully the results will be enough to ground me from orbit and make me keep my Rev2 instead of searching for another tier 2 controller keyboard...
HTH