This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Hi, =20 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".) =20 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.) =20 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? =20 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? =20 Any thoughts out there? =20 Brian Trout Quarryville, Pa. btrout@desupernet.net =20 ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/91/10/26/f2/attachment.htm ---------------------- multipart/alternative attachment--
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