[music-dsp] tube saturation algorithm research

Vesa Norilo vesa.norilo at saunalahti.fi
Sun Jul 10 17:39:08 EDT 2005

>is there any white paper or online reading that states the distortion
>indexes of the harmonics that a tube creates?

If you find one, let me know.

However, there's a nice way to measure them.

Record a sine sweep through the equipment you measure. Do 
autocorrelation. Observe distortion components in the result. You see, 
it thinks that the extraneous harmonics are 'echoes' of the primary sine 


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