What I meant about the Audya vocal processor is that, I don't like my voice, so when I sing or use the harmonizer on the Audya there is allot of effects, reverb and a bit of what I like to call "analogue" type sound to it, it's a little dirty which helps me with my voice.
The korg is I think a more superior type of vocalizer and processor but for a voice like mine it too good. But once again it's my own feelings on this. everyones miles will differ.
The piano sound is not as good as the Korg's but I prefer it over the Korg because of how I use it. If you were to play as a solo piano act with out any background the Korg is the true winner, it's samples and nuances are un matched. But since I do not play solo piano the Audya piano has a very good bright piano that cuts through the mix, which I prefer.
Once again I like vanilla you like chocolate and someone else like anchovies.
They all work, just what works for you.
I can't make up your mind for you, but whatever you pick will be great, since you are picking from the top ones
hope this helps
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