Fred Sturm writes; >So the question I have, which maybe Dean Reyburn >can answer, is why the RCT is able to pick this up while the SAT is not. Reyburn CyberTuner has an auto-measure feature in which the user does not have to judge whether a display is moving or not, the computer makes the measurement by itself and displays the results. It's accurate to .01 cents though each measurement on a real piano may not be in a .02 range as you might expect. Piano pitch varies several tenths of a cent (or more!) from attack to decay, and depends greatly on strike force. >I don't think it is just a matter of relative accuracy (the SAT is very >reliable within .2 cents, even accounting for difficulty in interpreting the >lights). Its not exactly accuracy, but RCT's flat/sharp display is more sensitive that any other display I have seen. For example, it uses 128 discrete positions around the circle. Its response is fast enough to see extremely small changes in pitch instantly. The sensitivity of the display can be increased or decreased by the user, making it super-sensitive allowing you to see extremely small pitch changes. > Maybe it has to do with the time element - how long a sample the RCT >takes before measuring vs. the SAT. The auto-measure ("Listener") mode uses about a 5 second recording time in the midrange. This time gradually decreases in the treble and increases in the bass to match the sustain in the average piano. After auto-measure, the user can view the "spinner" and manually change the measurement if he sees fit. RCT uses completely different filtering system than any other visual tuning device, its all digital like a compact disc, that may be part of the reason for the difference. You might want to try another piano also, I suspect you will get a little different result with each piano. -Dean ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dean L. Reyburn, RPT 2695 Indian Lakes Road Cedar Springs, Michigan, USA web page: www.reyburn.com 1-888-SOFT-440 (or 616-696-0500) email: dean@reyburn.com
This PTG archive page provided courtesy of Moy Piano Service, LLC