I checked 440, 441 & 442 and they came up accurate on my 'puter. How'd they do that!? dp David M. Porritt, RPT dporritt at smu.edu -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of david at piano.plus.com Sent: Tuesday, May 06, 2008 10:28 AM To: pianotech at ptg.org Subject: Re: A=440 was Tuning Another thing is that from time to time one comes across customers who bring out an old tuning fork. They're never at the right pitch. They have the note stamped on them, but not the frequency, and it's never concert pitch! I came across a website that has a nice 440Hz tone, with a great demonstration of beats between 440, 441 and 442. It's at: http://www.indiana.edu/~emusic/acoustics/phase.htm Bottom of the page has the demo. I did wonder whether different sound cards might affect the accuracy, but I've tried it on several computers and get identical results. Best regards, David.
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