
Divisor - Lunetta-inspired noisemaker
-------------------------------------

WARNING: This thing is capable of making very loud and nasty sounds. I suggest keeping the volume low when playing around.

Squarewaves -> logic = noisy fun.

If you're familiar with the Lunetta concept, you know what to expect here. If not, they're basically lofi diy synths made with CMOS logic chips. See this link for more info:

http://electro-music.com/forum/forum-160.html

I've included an image with a block diagram in this zip file. Though this isn't a complicated synth, it's probably easier to understand what's going on by looking at that than reading any instructions. Here's the basics though:

There are 3 squarewave oscillators. One of these feeds a divider, which divides the input by n, n being a "voltage" supplied by an LFO. 2 other squarewaves feed an XOR gate, which acts as an amplitude modulator. The output of the XOR and divider are then either added or fed through another logic gate (XOR or NAND in this case), depending on the "Mix Mode" setting. This mix is then fed through simple high and low cut filters, and then an ADSR-controlled amplifier.

All 3 oscillators can have their frequency modulated by 2 square LFO's. Though all 3 oscs share the same LFO's, each oscillator has a mixer similar to the output mixer that lets you choose how the LFO's are mixed (or not) before being fed to its individual FM input.

Also, the XOR oscillator mix (oscs 2 & 3) can be further amplitude-modulated by a second pair of LFO's, again with selectable mixing type.


If none of that makes sense, don't worry. This isn't designed for precisely-tuned musical sounds, just tweak some knobs and see what happens.


Enjoy,
Kevin B. (noisenerd @ FlowStone forums)


Acknowledgements
----------------

VC Divider by BobF:

http://www.dsprobotics.com/support/viewtopic.php?f=3&t=3765

