>Hi Ron, > I've done quite a few measurements on the string coupling effect. >When an average 3 string unison is tuned for full blush (RCT) on each >individual string, >2 strings played together will show about 0.3 cent flat, 3 strings will >show 0.5 cent flat. >I'm not so sure what the imformation is telling me. >Regards Roger Roger, Over what range of the keyboard do you find this affect? 0.5 cents seems alot to me (i.e. I think I'd better be compensating for it if it's that wide!). My recollection of Jim Coleman's writings on this subject is that it occurred mainly in octave 5. What brand & model of piano are you measuring this on? Thanks, Patrick Draine
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