This post is part of a series on working with an FAC tuning. There are a number of tweaks that can be done to further fit an FAC tuning to the piano, before changing the F number.
Programming a custom over pull is so easy it’s not worth making a video of it. The custom over pull is ‘activated’ just like the regular pitch raise feature, but instead of rolling off onto the BlueShift, after MSR stops the lights, roll off onto the Green Shift. Rolling off on to the GREEN shift activates he Custom Over Pull and uses the amounts stored on Page 123.
Even though the width of the prime octave’s may be perfect, the piano’s scaling within that octave often results in a pair of ‘unbalanced’ prime 5ths: (A3/E4 & D4/A4)
DOB allows us to easily stretch or contract a template or tuning stored in the SAT.
The ‘4th A4 Number’ is the width of the prime’s 2:1 after it has been tuned as a pure 4:2. Knowing this 4th A4 number from the very beginning lets me know immediately what I’m going to be dealing with on that particular piano.
The need for this tweak has been around for some years now, but it should be used whenever using an FAC tuning. (Contains button pressing video).