Explaining Maths

YouTube via ccdm9 | November 14, 2010 |

"This is a video for all those people in eurorack land that can't seem to figure out their Make Noise MATHS. Just made this in my spare time after being very confused when I first got this module at the beginning of this year. Hope it's helpful!

Some notes from Navs, a fellow Wiggler
"The CV inputs for channels 1 & 4 (rise/fall vs. both) respond differently. A positive voltage to 'rise' & 'fall' extends those times (and vice versa). A positive voltage to 'both' shortens the times (and vice versa). This means when using Maths as a VCO, you can patch your keyboard voltage etc. to the both CV input and get 'higher' (or faster) oscillations, as you would with a normal VCO.

When triggered or when cycling, channels 1 & 4 are AD envelopes. Feed a gate signal from a keyboard or Pressure Points to the 'input' jack (the one marked with the arrow) and you get an AR envelope. This is essentially a slewed gate signal. The difference to the AD being, you can 'hold' the envelope high, similar to the sustain portion of an ADSR. This is also great with the 'Press CV' from PP to give you a nice fade in/ out.

The OR output traces the maximum positive voltage of the combined inputs. It is positive-only in Maths as it makes more sense when used with envelopes, but this is not always how it is implemented. Have a look at the Doepfer A-172 manual for more info: http://doepfer.de/A172.htm

Lastly, the difference between the EOR and EOC outs is key to certain effects and really useful. Basically, you could think of the EOR as enabling quadrature-type functions (offset) and the EOC as a chain function (sequential).

I think these two outputs are incredibly useful! They make some of the more exotic Maths patches possible (gate delay, swing, variable step length, flipflop, comparator, digital inverter etc.) and they are perfect for pinging a filter!"