pink~ generates pink noise, as distinguished from white noise (which the object noise~ generates). White noise has constant spectral power per hertz of bandwidth, while pink noise has constant power per octave. Subjectively, pink noise sounds less hissy than white noise. Perceptually, white noise sounds bright and harsh, and pink noise sounds more even and "natural".

The output is a signal consisting of random values in the range -1.0 to 1.0, with an even distribution of power per octave of frequency.