Blue Box even better

[Jules Ryckebusch]

> Hi All. I built in the early 80's a very similar (but better) device. It
> uses a high gain pre that runs into a comaparator, cleaning up the wave
> form to a true square wave. Then I ran it into a 555 timer set up as a
> monostable multivibrator with an adjustable pulse width from a resistance
> pedal. It turns a guitar into a PWM sounding synth lead. Then you have
> the option of increasing pulse width beyond duty cycle of the frequency
> of the guitar note. and viola, instant octave shift. It took a lot of
> finnese to play well but sounded neat.

Jules