After a few fruitless years of trying to buy a Rack 3 I snagged a Lead 4R at a very, very good price last week and have been digging into it for the last few days. It feels a little bitter dwelling on the amount of stuff that has been removed from the 2/3 - pretty much every unique Lead 3 feature is gone and there are a few things from my old 2 that I miss badly (ringmod, simultaneous sync+fm, notch+LP filter, drum maps, etc).
BUT:
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It sounds incredible, like a more clear and strident take on the 2/2x engine.
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Classic ear-ripping Nord FM in spades.
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Two morph groups plus seven impulse morphs that can all be addressed by standard MIDI messages. This is insanely powerful and means I just need to send three different CCs from my OT to get a huge amount of timbral variation.
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Some of the FX choices are bizarre (two vocal filters and no chorus?) but they work perfectly when modulated via morph groups. Modulating the delay on a hellish Nord FM patch is instant EP7.
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Perhaps most important (and maybe least discussed) aspect is the mutator. Far more useful than typical randomiser functions and you can activate it while the synth is running with no latency or dropouts. You can even put the synth into multi focus mode, and instantly apply separate mutations to each of the four slots in a performance at once. I cannot overstate how powerful this is, even for just creating variations or subtly mutating your whole track live, mid playback. It can only be improved if you could save the results of a mutation to a morph group (I think the A1 does this, which makes me far more interested after years of dismissing it)
I’ve been lucky enough to fuck around with a Korg Radias and Virus TI recently and the Lead 4 sounds way better than either and is far more fun and fluid to use. Timbral shifts and modulations that require a whole bunch of program changes or mod matrix slots on those can be done with just a couple of CCs on this.
I know a few guys who could line this up…