From a non-professional, non-gigging, hobbyist's point of view, I think the 950 sets a new standard. First of all, it SOUNDS very natural - the overall system sounds new and different to my ears - being used to the 910 and CVP509. I'd say the ambience of the keyboard gives a live performance sense - better than the 910, but still a bit more refined than the Korg Pa line, which is more edgy. I like the genre-specific audio drum recording methods used - they seem faithful to the era of the style. But I am also very impressed with how much better the guitars sound in the styles now that Yamaha has employed the use of real distortion. Just about every style sounds fresh - even those I am familiar with.
As I played late into the night last night, I was forced to use headphones. I was further impressed. The direct sound seemed even better to me. The aural balance seemed perfect.
I'll leave the list of disappointments regarding this board to someone else (there are some disappointments, as no keyboard is perfect in every way for every taste).
Right now I'm loving and enjoying the new toy.
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Tim Schaeffer
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YAMAHA CVP-509 / Korg Pa300