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Blue noise is a kind of signal whose spectral density increases by 3 dB per octave. Sounds more brighter than white noise, with low frequencies totally missing.
In mastering, blue noise can be used with dithering to randomize the quantization errors, while converting the bit depth of the signal.
Also, blue noise is used for medical purposes, to mask ringing in the ears.
Blue noise (Azure) MONO, in WAV (16 bit, 44100).
Used maximum render quality for KZbin - AAC (320kbit, 44100).
+3 dB/oct