Here are the new and improved locations for each of those partial changes:
The Treble Partial Change should be lowered to G#5/A5
The Middle Partial Change should be lowered to A4/A#4
The Tenor Partial Change should be lowered to G#2/A2
Robert Conrad, Registered Piano Tuner/Technician, Tucson, AZ
All ‘computer generated’ tunings have partial changes and those partial changes may contain an error. Correcting these partial change errors can greatly improve the sound of the tuning. The number of partial changes contained in the ‘computer generated’ tunings will vary depending on the ETD. This procedure will show how to use the Partial Change…
Because we can’t use the same partials to tune A0 and C8, there must be at least one partial change in every tuning software system. All tuning software systems contain partial ‘changes’. Whenever the software switches from one partial to another during the course of the tuning, an error at that partial change is very likely. Since every partial change is a potential tuning issue, the fewer partial changes the better. The higher partials are less reliable then the lower partials.