[HAM] Tone Generator

[Dave Bishop]

O.K., I understand now how you made these clips, and I'm a bit surprised 
about the amount of variance between tonewheels.  As I recall, the problem 
with measuring tonewheel assemblies is that a significant fraction of the 
output voltage is expressed as low frequencies (rumble), but the amount of 
rumble is different for each tonewheel.  The rumble skews the amplitude of 
the quaisi-sine wave produced.  I wonder whether you could go back to the 
original wave files and EQ out everything below 45-50 hz, and then republish 
the graphic audio file.  Do you think it would make a difference in the 
relative amplitude of nos. 13-91?  I'm guessing that would make a more 
accurate curve.

Then, it would be interesting to apply a Fletcher-Munson curve to make the 
graph a better representation of what the ear actually hears.

Regards,

Dave Bishop