On 1/20/2011 8:48 PM, Bill Fritz wrote: > but in the 1930/40's, the USA had a radio station (WWV) that actually > added the output 440Hz for use in calibration Am I correct in thinking that the top note of the dial tone is always 440? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20110120/6e10bc6d/attachment.htm>
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