Jim Coleman, Sr. wrote: > > Hi Robert: > > In the calibrate mode, the program and machine are being calibrated to > the internal quartz crystal frequency. > > On the newer machine which are temperature compensated, they stay in > calibration very well. > > The older machines tend to drift a bit, hence the need for calibration. > > Jim Coleman, Sr. > > Jim, what's older mean? 5 years or more? > > > > > > -- Frank Cahill Associate Member, Piano Technicians Guild Northern Va
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