Comment 8 for bug 1639499

It is a real time process. You record while you mix. This can be used to listen to it later (learn or share) as well as keeping a record of a live mix that you realize.

I'm not sure if the process itself should be too complex. Of course, there are different ways to dither with noise shape, but basically, the concepts are:

dither: add uncorrelated noise to the signal, so that when the bits of the signal are truncated, it does not generate correlated distortion (in form of frequencies correlated with the sound).

noise shaping: a technique in which white noise is modified in such a way that its frequency representation gets a different shape than flat line. Given the human ear, the shape commonly used is similar to an increasing line (i.e. lower power in the lower frequencies and higher power in the higher frequencies).

Usually, software use Triangular-PDF (the type of noise shaping) dither. Said that, I don't know the exact details of this technique.