

Repro's voice detune seems to run at different frequencies across the keyboard whereas Prophet V's seems to run at a constant frequency. Arturia's implementation of the noise seems fully random at max value, while u-he's doesn't really sound like a noise signal at all to me. The LFO/Noise control in the Wheel Mod section behaves differently. The waveforms for oscillator B seem to sum with one another very differently on the two synths. Some of Arturia's knobs are set up so they don't scale linearly, which I expect is because they generally seem to cover larger ranges than u-he's. U-he gives only 0-100 numbers whereas Arturia gives frequency values, ms values, and so forth. On ADSR, for example, middle ranges seem more similar across the two synths than extreme ranges. Some of the knobs scale differently on Repro vs. Some other differences between Repro-5 and and Prophet V: I wonder if part of the reason people think Arturia's models sound bad is that people are unknowingly setting the synths up in ways that are, in fact, uncharacteristic of the hardware being modeled - not because the models are bad, but because the models don't tell you where the hardware limits are. I haven't done much testing beyond this, but it's pretty clear that u-he's design philosophy is to model the strict limitations of the hardware's controls while Arturia's is to allow you to blow right on past those limitations (and accidentally lose the character of the synth if you don't know what you're doing). And Prophet V's ADSR values need to be backed off to like the third tick mark before they sound like Repro at min/max. Like for example, Prophet V's voice detune needs to be at around 33% before it sounds like Repro's voice detune at 0. You have to back a bunch of Prophet V's controls off from their min/max points before it actually sounds like Repro. In practical terms, this means that if you completely zero things out in both synths, Repro sounds more alive than Prophet V. Repro seems to be modeling the hardware ADSR limits while Prophet V allows you to go past them.

The most significant difference in sound that I've noticed so far is that a lot of the controls (such as filter ADSR) on Prophet V can be, for lack of a better term, set more perfectly than Repro's. I'm demoing Repro-5 and trying to compare it to Arturia's Prophet V.
