Ric, I agree with your assessment of "calculated" tunings of ETDs. Never liked it and don't do it. Although I use an ETD, I NEVER use it to "Calculate" the tuning. The piano will tell you/me, (Aurally), what it will take, in terms of "stretch", (God, I hate that word! I prefer "expansion".) Regards, Joe Garrett, RPT, (Oregon) I'm never lost, because everyone is telling me where to go. <G>
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