Dear historical temperament mavens, I've been asked to tune a "tack" piano according to Lou Harrison's instructions (Cinna, 1955). The schema calls for tuning intervals as ratios and I'd like to know if there is a way to convert these fractional numbers to offsets. I have only a short window of time on stage (Sat, 1/20) and it would be very easy to do if I can use RCT. Tom Cole
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