A few synth modules

[dandistine]

A couple useful modules.

Mixer - A basic mixer with an arbitrary (at compile time) number of inputs Delay - Delay line for echos and such. This maybe needs to take into account the dTimeStep but I'm unsure. FirstOrderFilter - A basic first order filter. Higher order filters can be composited from these. Again, not sure about needing dTimeStep. Pinkifier - A third order filter that approximately filters white noise into pink noise. Same disclaimer with dTimeStep.