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Pyramix Mixer
12 - 129
Ramses MSC reference guide
Pyramix Mixer : Mixer Presets
Noise Shaping
Noise shaping is a technique that is used to push quantization noise energy, which in linear digital systems
is normally spread over the whole audio spectrum (0 Hz up to half the sampling frequency), into higher fre-
quencies where the human ear is less sensitive to its effects. There are three noise shaping options and the
graph shows the curve applied:
Off
No noise shaping added.
Hi Pass
This provides a first-order high-pass filter for the noise transfer function. This type of noise shaping takes lit-
tle computational power to produce, but at the expense of not tracking the characteristics of the human ear
very accurately compared to:
Acoustic
Psycho acoustically noise shaped dither inserts an FIR-filter in the feedback path. This shapes the noise as
closely as possible to the characteristics of the human ear. More taps in this type of filter allow a closer
approximation to the response curve of the ear, but each tap, of course, increases the computational
instructions required. The filter implemented here is a 9-tap FIR-filter, which closely approximates the curve
of the human ear.
POW-r
POW-r
offers the choice of three settings,
POW-r 1
,
POW-r 2
and
POW-r 3
. The graph indicates the effect
of the noise-shaping.
Mixer Presets
Mixer Presets can be saved in a user folder or added to the main
Mixer Preset
list either for the current
user or all users.
Dithering
POW-r
floating Window