[sdiy] L(Cheapo)FO correction

[Michael Ruberto]

I finally got an O-Scope so I've made some minor changes to improve my LFO.
R8 - 300K
C1 - .01uF

This will give a much, much nicer sine wave but the amplitude is reduced to 
2.5 volts. Simply amplify this output if you need a larger signal.
Also, some neat things to try for you circuit benders out there. R8 can be 
replaced with a pot to get a range of weird waveshapes. As you increase the 
signal level on the sine shaper's input, it will start making the sine less 
rounded and more angular. At extreme input levels you get something like a 
rocket ship shape.
Another weird wave can be found at pin 12 on the 324.
Also, diverting the sawtooth into the sine shaper does indeed make a nicely 
rounded saw shape which doesn't sound very interesting but could be quite 
useful for modulation effects.

M. A. Ruberto