Sound are a good way to tell if a spoke have the right tension. (Plonking a spoke creates a specific tone at a specific tension.)
If for example Gary could agree with himself when each specific wheel are true and have the right tensions, he could publish the note for each size.
![Wink ;)](https://goldenmotor.com/SMF/Smileys/default/wink.gif)
There would be a different note/tone for each size, and for pie/prokit...
Ofcourse, not all spokes can be set to exactly the same tone, since trueing would mean slightly different tensions of the individual spokes, but having a base note would be a good start.
Searching the net for 'spoke tension by tone' gives a good deal of info...