sharp "E" on Yamaha psr-640 and psr-740
by james lee
(Greenville South Carolina USA)
I have a psr-640 and a psr-740 workstation. The second octave "e" note is slightly sharp on both. If you tune the pitch using the utility (by -10 cents or -10/100 of a semitone)the second octave "e" will be correct, however all other octaves will be flat by - 10. Is this something that can be corrected and how would you go about correcting the problem.
note:all other notes are standard 440.