<html> <body> <pre>>Do you mean +/- 6 cents? You couldn't go +/- 6 Hz, up and down. My reply was to </pre>Alan Forsyth's description of the tuning and how an ETD might facilitate its accomplishment. +/-6 c @ A4 would produce about 3bps by having the strings ~438.5, 440, 441.5; respectively. (6c being ~1.5bps) +/-6 Bps would produce about 12 bps (434, 440, 446) which would be a rather vibrant sounding note. Weather or not a 12 bps spread @ A4 is desirable is up for speculation but I will take Alan's word for it. It seems a little much especially at the top treble. Has anyone else tried it? <x-sigsep></x-sigsep> Regards, Jon Page, piano technician Harwich Port, Cape Cod, Mass. <a href="mailto:jonpage@comcast.net" eudora="autourl">mailto:jonpage@comcast.net </a>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ </body> </html>