Hi
Use "Unison". You should be able to find it in the Edit menu. Once Unison is enabled you can specify detuning and however many extra voices you wish.
However if you want higher polyphony, enable oscillator 2 and incorporate that instead of increasing the number of voices of unison too much.
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PS > And another thing! Will the Ti|3 have user customisable/importable wavetables?
A ribbon-controller or XY-Pad might be nice, too, please! Thanks!