Many years ago I had a a proper synthesizer - Ensoniq SD1 - with full sound edit capability. However the preset sounds were pretty good, the only Sound I created was a very punchy brass voice to let me do big hits in "New York, New York".

My point is this - for those of us playing mainstream covers - how often do we need to edit voices? No argument that the Yamaha voice editor is not in the same league as Korg, but to what proportion of the market is this difference significant?