welcome to the forum
It's his 169th post 
Garcho, the original has sawtooth, to produce that percussive thump, that squares don't have
Square waves don't thump? How exactly is the right angle of a saw tooth different than a square wave? Is it that a ramp is "thumping" half as often as a square (considering rising and falling edges as thumps)?
Cr-ri-im-ms-so-on an-nd cl-lo-ov-ve-er ov-ve-er an-nd ov-ve-er...
1) oops, i did that because the question reads like one of those first time poster questions.
i apologize for that, it's been a rough day.
2) the square wave doesn't thump as much as it chops.
the LFO of the repeat percussion has an instantaneous sweep up and a ''hanging'' curve down, this gives a perceptual thump, since we interpret that as coming above the average audio level, where the square wave just chops like a helicopter, because the tops of the waves are flat, no such peak is interpreted subconsciously.
the LFO from the repeat percussion is quite odd, since the amplitude that comes out is 0 to 0.6v
i haven't tried these suggestions yet, so i recommend bread-boarding it first.
if you want a more gradual triangle, you could try changing the 39 ohm resistor, if you put in a higher resistance, it might get smoother. if you want more square wave signals, you could try adding a large non-polarized cap across the 330k that goes in to the base, maybe with a series potentiometer to tone it down, it will drive the base in to fully opening and closing.
cheers, Iain
