Here is how to convert Scala files to TUN files. We have to select a Scala
file, and add information about the actual desired pitch for the scale to anchor
to since Scala files by themselves are for scales and not tunings. As
they don’t include the specific pitch information needed to create a complete
instrument tuning, we will add that here.
Scala files have the suffix .SCL
C3 = 261.625565 Hz
A3 = 440.000000 Hz
D3 = 293.333333 Hz
A3 = 415.000000 Hz
D3 = 276.666667 Hz
Middle C is C3. Concert A is A3.