This guy in YouTube is showing some very nice features of the Yamaha arrangers with excellent video sound quality. I liked this one but there are many more:
http://www.youtube.com/watch?v=nnz-7jbAg-c&feature=sub


Victor
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Victor

Korg Pa3x 61 - Mediastation X76 - Yamaha Psr s900 - Korg Tr61 - Roland PK5A - NanoKontrol - Ensoniq SQ1 - Yamaha D85 organ