---------------------- multipart/alternative attachment List, I too have been wondering just what is accurate. My SAT reads my Bechstein fork at approx. 1 1/2 cents flat. I assumed that the fork that went with such an expensive instrument would be accurate. And my SAT was calibrated and re-worked with new boards less than 1 year ago. Clark Sprague Greenwich, Ohio Brian Trout wrote: > Hi, I have been tuning aurally for most of the time I've tuned. When I first > started out, I got a chrome plated steel tuning fork. It's not very loud, but > it seems to be pretty stable. I've heated it up to well over 100 degrees, and > put it in the freezer to cool it down, and measured as best I could in both > extremes. It doesn't move much, perhaps 1 or 1 1/2 cycles from one end of the > extreme to the other. (It's hard to measure, because it starts changing back > to room temperature before I can really get some good "listens".) At work > amongst the tuners, we have 3 tuning forks, and 3 "machines", none of which > are over about $200 machines. My personal observations to date lead me to > believe that the forks are all very close to each other. However, the > machines are quite different, one of which actually tunes a piano sharp enough > to hear audible beating when played with another piano tuned with a fork. > (This is when you're trying to set the pitch at A-440.) My question is, how > does one determine which A-440 is right? Is there an easy way to do that > without finding an electronic frequency counter? I can't think of anyone who > has one. I'm just trying to figure out if real tuning fork accuracy is > possible in a real world. To what do we pay homage as the "ultimate" standard > measuring device? Who's "ultimate" standard measuring device is right if they > don't agree??? If I find one person with an SAT and one with an RTC and the > A-440's aren't the same, who's right? I'm not trying to be obnoxious here, but > I've been reading about the "big test", and what's involved. It all starts > with the basic premise that we start at A-440. It's been worrying me a bit. > Who's A-440? Any thoughts out there? Brian TroutQuarryville, > Pa.btrout@desupernet.net ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/0b/95/af/42/attachment.htm ---------------------- multipart/alternative attachment--
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