<div dir="ltr"><div class="gmail_quote">On Mon, Aug 25, 2008 at 7:53 AM, Mike Spalding <span dir="ltr"><<a href="mailto:mike.spalding1@verizon.net">mike.spalding1@verizon.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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This piano was tuned to A440 in March, and by August the A2 - A3 octave was 13 cents wide. Are you saying that If I had floated the pitch at 439 in March, that octave would not have gone as wide?<br><font color="#888888">
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Mike<br>
</font></blockquote></div><br>It depends on your humidity swing. But, yes, it probably would not be as wide in August. If you are tuning right before a humidity increase, you can tune the tenor section a bit flat, and the bass octaves slightly sharp (in anticipation of the tenor going sharp).<div>
<br></div><div>Like I said before, to you and me as tuners, either way the octaves would sound off. It just wouldn't be as bad if the tenor is not raised as much, then further increases because of humidity. And you can't do this with critical situations. But it works for homes, and should work fine for schools. Better stability is the goal.</div>
<div><br></div><div>I've observed this repeatedly with a church Yamaha C3 that experienced huge changes with humidity. Before I "clued in", I would be doing a pitch raise to A440 in late winter, and the piano would be 12 cents sharp by early summer. And it sounded horrid! After I realized that the pitch corrections were causing instability, I would leave the overall pitch just under A440 (A440- 3 cents since their organ was at A440) in winter, and just over in summer. It then stayed much closer to A440 throughout the year.<br clear="all">
<br></div><div>The climate control in that church was horrible. Before I installed a DC system, it got tuned 5-6 times a year. Now, it is tuned 2-3 times a year. The tenor was always incredibly out of tune with the rest of the piano. With the DC, it still goes out, but not nearly as much.</div>
<div> <br>-- <br>JF<br>
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