Evaluate the possiblity of creating useful random units

[sofian]

It could be interesting to introduce some user-friendly sources and possibly filters for random processes. Some ideas include:

• a source similar to Metro but that would generate random pulses
• a kind of random "oscillator" (LFO) source similar to other Osc sources that would generate random values according to different parameters and types (random walk, perlin noise, etc.)
• different types of random generators (uniform, gaussian, pink noise, brown noise, etc.)

The choice here is very important to stay in the spirit of Plaquette providing a core set of useful and generic classes that can be used as building blocks. It could be interesting to provide some of these random processes as a separate library.