This special collection applies the concept behind the “colors of noise” and goes even further bringing a lot more noise color variations: White – flat frequency spectrum Pink – 3db/oct low pass Red – 6db/oct low pass Blue – 3db/oct hi pass Violet – 6db/oct hi pass Grey – equal loudness curve eq Green – bandpass Black – this is a special one. A black noise is literally silence. So we removed all the frequencies in the audible spectrum leaving only content below 20 Hz and above 20kKz. All of the other noise colors are of course invented by us following resemblance from the real ones. 20 x WAV 44.1kHz, 24-bit.