---------- > From: Jim Coleman, Sr. <pianotoo@IMAP2.ASU.EDU> > To: Don <drose@dlcwest.com> > Cc: pianotech@ptg.org > Subject: Re:1/2 cent difference on unison > Date: Thursday, January 29, 1998 2:11 PM > > > For just a minor correction due to further research. This phenomenon of > the complete 3 string unison giving off a pitch lower than any of the 3 > single strings individually is primarily observable in the 5th and 6th > octave only. Can this be demonstrated aurally? I still on occasion will tune say G6, get the double tenth I wanted from D#4, tune out the unison, then find my dlb 10th was now slower than the beginning. The first string must have been knocked down a hair when tuning the second string, and isn't caught until the unison is completed and checked again. So one learns to tune a little higher... hmm I wonder... It would happen all the time then, but since you don't tune all of the treble notes then it wouldn't happen all the time, and if you do have to tune all of the treble notes you wouldn't be fine tuning. Richard Moody . > > I have measured cases > where the difference is as much as .9 cents. Then there are cases where the > difference is negligible even in that area. I don't think anyone yet has a > firm explanation for it. > > Jim Coleman, Sr. > > On Thu, 29 Jan 1998, Don wrote: > > > > Who has demonstrated this and how? > > Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. > > "Tuner for the Centre of the Arts" > > drose@dlcwest.com > > 3004 Grant Rd. > > REGINA, SK > > S4S 5G7 > > 306-352-3620 or 1-888-29t-uner > >
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