Robert Conrad, Registered Piano Tuner/Technician, Tucson, AZ
Partial Changes and Correction in Computerized Piano Tuning Part 1. Introduction This section explains the challenges created by partial changes in computerized piano tuning systems. It focuses on where these errors occur, why they matter, how they can accumulate across a tuning, and how the Sanderson AccuTuner IV’s Partial Change Correction (PCC) feature helps technicians…
Best-Practice Overview When refining FAC tunings, start by setting the A Multiplier Default to 0.8. This usually places A4 very close to the A440 standard. Next, lower the tenor partial change from the FAC default of B2/C3 to G#2/A2. Check the A2/A4 Double-Octave Width After the tenor partial change is lowered to G#2/A2, both A2…
A Multiplier Default In SAT IV, the default “A” Multiplier for FAC tuning is 1.0. You can change this value through the SAT IV MENU feature. Recommended Setting for A440 To place A4 closer to the A440 standard, set the A Multiplier Default to 0.8. Without this adjustment, FAC tunings often place A4 slightly sharp.…