The 'ONLY' reason I have to run out stereo, is because, as a performing musician who features 'acoustic piano' playing, the top acoustic piano patches on Yamaha PSR keyboards all require a true 'stereo image' to sound decent. Going out mono results in effects phase cancellation, resuslting in a thin unacceptable acoustic piano sound. If it weren't for this, going out Mono would be fine with me for my gigs. - Scott
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