Velvet Noise UnitRandom (+/-) trigger generator with rate control.
Velvet noise is a random train of positive and negative pulses that are each only one sample in length. Digitally speaking, it is a random sequence of the following three values: -1, 0, and 1. The rate (and hence the density) of the velvet noise can be controlled by changing the probability that a zero value will be generated.
I first encountered velvet noise when studying reverbation algorithms such as these.
Some applications are:
- Generating random triggers at a target rate.
- A smoother (as in butter) sounding alternative to white noise.
- Popcorn simulator.
- Jazz drum solo generator when used to trigger a drum voice.
The rate parameter controls how often (on average) this unit outputs a trigger. Each trigger has a 50/50 chance to be positive or negative. For example, setting the rate to 1Hz means that this unit will a trigger on average once a second.