Hi RicRob,
As you've discovered, the Music Finder does not store customized main/left or layered voices. In fact, the 'ONLY' PSR2000 sound/style settings stored in the Music Finder are:
1) Style (and the associated OTS settings saved with that specific style)
2) Tempo
All other Music Finder data fields are of the search genre, beat, tempo variety, useful for exsisting suppplied song selections provided by the song title list updated and available on the SVP World site, but not worth spending time adding new songs to it (just my personal opinion).
As you can see, the Music Finder, though convenient and useful for searching and matching internal styles to specific songs, is pretty limited. I initally (when I first purchased the PSR2000) used the Music Finder to locate suitable styles/tempos for specific popular songs, but once you become familar with all the styles on the 2000, it's a lot faster to just locate the appropriate style directly and setup up the tempo on the fly. I also draw from a large collection of custom Registration Memory setups for a lot of my material (which include voice, style, and other setting). There are so many ways to access song setups on the PSR2000, but I personally find the Memory Registration the MOST flexible & powerful. - Scott
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http://scottyee.com