Wednesday, October 21, 2009

Probability of a Fax Machine

A pitch modulating circuit using a s/h waveform lfo. Generates a variety of sounds from subtle pitch variation to total poop digital breakdown.


Period: This knob controls the period of the s/h wave form. (Essentially the speed or rate of the LFO).

Mix: This allows you to blend the clean sound going into the pedal with the effected sound coming out of the pedal. One extreme => just clean, the other extreme => just effected signal.

Volume: A master output level control.

Mean: The end result of this knob is not simply explained and its result is highly interactive with the skew knob. It will affect several things sonically. At min the effect will be subtle and the sound quality will be quite high. As the knob is rotated the probability of glitchy sounds will increase, however their will be some headroom where quite normal sounding tones will be produced.

Skew: This knob is interactive with the mean knob. It will in effect control the variation of pitches that is produced. However this range is also somewhat controlled by mean. An example: Mean somewhere in teh middle and skew quite low will result in just small pitch variations. With skew increased the pitch variation between the output tones will be more varied.

The best way to get a feel for what these knobs do is to watch the sample videos...

sample with clean guitar here


My friend asked me to make something like this for him.

What it is:

More or less a mixer of 2 effect loops. One loop has the volume control at the effect send and one loop has the volume control after the return. The x-axis of the stick controls one loop and y-axis the other.

Also each channel can be subjected to a feedback loop, which makes it behave a bit like the "total sonic annihilation" pedal (per loop).

Tuesday, October 20, 2009

red llama clone

This is the last of the left over boards from a workshop long ago... Built for a friend. Its sort of a mix between the anderton hexfuzz and the red llama. I think the red llama doesn't actually have the additional overdrive switch, but it uses different 'tone' caps than the hexfuzz.

This is sort of the best of both worlds with the switch implemented in stop form and a red/green led to indicate which mode your in.

From the waves you can see the regular overdrive is asymmetrical and a bit soft. IT sounds not bad. People seem to like it.

Heres the led... one button is bypass and one is the 'mode' of the overdrive... knobs are volume and gain.

Heres a look at the signal... order is something like clean, low gain, play with gain knob, play with volume knob, change to high gain/low gain/off etc...