A440 lowered 1/2 cent is 439.873 or a diff of .125 bps. or one beat in 8 seconds. I have not posted calculations from this formula so if any one collobrates, or comes up different please let me know. I am pretty sure it is since beats double or halve through the octaves, and it calculates .064 for 220. Interesting though, this change at A440 calls for almost half a beat per second in the fifth above, and a quarter of a beat difference in the octave. The spread sheets are now in QuatroPro if any one is interested in addition to MSWorks. R Moody
This PTG archive page provided courtesy of Moy Piano Service, LLC