I can layer up to five stereo voices on one note with a G70. Ten oscillators. Play a four note chord, forty oscillators. Still got 86 left over for style and note tails.

Not that I ever would NEED to layer five stereo sounds for one note, but it could still be done. wink

To be honest, I don't think, in six YEARS of playing my G70, I have EVER heard a drop out ONCE. 128 is PLENTY.
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An arranger is just a tool. What matters is what you build with it..!