Even so, losing an entire accompaniment PART, rather than just a note or so, I still think there's something about the SA nature of the sounds. This is the first arranger Yamaha have allowed SA sounds to be in the accompaniment section. Perhaps there are still some issues to be sorted out...?

But, bottom line is, you want to stack insane amounts of voices and play insane layers with Melody Intell on, you can choke just about anything.

The thing I find the most important isn't necessarily polyphony, but processor SPEED. The thing I noticed the MOST going from the G1000 to the G70 was that I could stack three stereo, VERY percussive sounds together, then play fast repeated chords by hand, and not hear the TRACE of 'flamming' amongst them. A HUGE improvement, and one that made for an incredible sense of being 'connected' to what you play, even on single note lines...

I wonder how many arrangers out there can pass this torture test (that you are actually more likely to do)..?

Try it... stack all THREE RH Parts in a layer, assign them to percussive stereo sounds (like piano, vibes and marimba), then play rapid four note chords. Hear it getting sloppy at all?
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An arranger is just a tool. What matters is what you build with it..!