Quantum Rainbow 2 is a 7HP compact module that outputs 4 types of noise.

White is noise in which all frequencies are mixed evenly, Red / Pink / Blue / Purple in order of -6dB / Oct low-pass noise, -3dB / Oct low-pass noise, + 3dB / Oct high-pass noise, + 6dB / Oct It becomes high pass noise.

The new noise added in Quantum Rainbow 2 is Gray and "Quanta" noise. Gray is noise with even frequency components on the auditory side, and Quanta is a special output that outputs a discrete level of +/- 5V. It can be adjusted with the trimmer under the back. The output is as large as 13.5Vpp.

Single noise and mixed noise are very useful for making percussive sounds.