My answers will be interspersed. Jim C. On 9 Aug 1996, Lawrence A. Gardner wrote: > Jim, > > Thank you for your responses on this forum. I've been lurking & learning from > this subject. I've some questions. > > So, how do you incorporate the dual FAC on a poorly scaled piano? In the past > I've liked strip muting it off, checking my A2, A3 & A4 to find out if they > worked (especially as a double octave). Then, I use the SAT to tune the > temperement on the 2 different pages. With it stripped off, it seems very easy > to find problems using contiguous 3rds. > You can check the A's with two mutes. Jim > Just recently I was tuning a Baldwin SF, and to my horror, there were about 2 > beats per sec. between A2 & A4. I carefully checked my stretch numbers, (and > didn't add the .2c to the A number) and the double octave slowed down to an > acceptable level. It seems to me that I would not have caught the bad stretch # > until late in the tuning, requriing another pass, had I not strip muted it off. You shouldn't need to change a Baldwin Sf10, that's a very good scale. Jim > > What exactly do you consider a pitch raise? Or, how many cents correction > requires two passes? For a Concert tuning, 5 to 10 cents would be a pitch raise. Otherwise about 15 to 20 cents or more. I have done 20 cent pitch raises in only one tuning as the final tuning. This can only be done by doing unisons as you go. > > As I understand it, you start with the plain wire strings. Does that mean you > initially ignore any wound strings on the tenor bridge? Yes. Jim > I would assume that you > start with the highest wound string and then go down, eg. Bb-26 descending to > A0 Yes. Jim > > How much drift do you encounter? Like .1c or .2c? So you just RESET the SAT > for that much pitch deviation and go on? ( I hate drift!) Sometimes 2 or 3 cents or more. > > Again, I really appreciate you sharing your wealth of information. THANKS!!! > > Larry Gardner, RPT > Jim Coleman, Sr. (AZ)
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