About 4 cents per beat in the middle of the piano. (To tune at A=442, we tune 8 cents sharp), so 10 beats should be around 40 cents. Set's see: a half-step is 100 cents, and at A4, A is 440 Hz and G#is about 415, so that's a difference of 25 Hz. Correlating this difference with 100 cents, yes, we have four cents per Hz, and thus 4 cents per beat. If the difference between A and G#'s frequency is 25 Hz, the two fundamentals will beat at 25 bps. If A is at 10bps with the fork, then the A is 10 Hz flatter than the fork, and 10 x 4 = 40 cents. --David Nereson, RPT P.S. Do sightless, or "blind" (which term is PC nowadays?) technicians have printers that print out e-mail in Braille, or something that converts it to vocal sounds or what? -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]On Behalf Of Vinny Samarco Sent: Wednesday, January 31, 2007 8:44 AM To: Pianotech Subject: This May Be A dumb Question. Hi, Before asking this question, let me say that I am blind, and of course, I don't use and etd. If I tell a customer that their piano is flat by 10 beats per second, how do I calculate cents? Thanks. Vinny
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