Auto comp, Dither and noise shaping, 4 auto comp – Sonnox Oxford Limiter User Manual
Page 18: 9 dither and noise shaping
8.4 AUTO COMP
9 DITHER AND NOISE SHAPING
8.4 AUTO COMP
Under normal circumstances, errors that are often restricted to certain specific events are
interspersed throughout the programme. The
AUTO COMP function is provided to
address the situation where it may be undesirable to reduce the level of the whole
programme to avoid transient errors. (AAX version: Referto Section 2.7 foranexplanation
ofthetwoReconMeteroperationmodes).
When the
AUTO COMP button is selected, the level of the output is automatically
controlled to repair reconstruction errors by the minimum amount required, and only for
the duration of the error. In this way the loudness of parts of the programme unaffected
by the errors remains as high as possible.
A combination of
AUTO COMP and manual output level reduction can be used to strike a
compromise, if the action of the error correction becomes intrusive in the presence of very
large and intermittent error conditions.
9 DitherandNoiseShaping
The finite mathematical precision provided
by digital audio systems and the effects of dither
have been a source of confusion in the audio
community for some years. Such discussion
may lead to possible misconceptions, which
may prevent the user from achieving maximum
performance from the systems in use. Therefore
the dithering options included in the Oxford
Limiter warrant some prior explanation.
The
DITHER
button (see right) toggles dither selection between
NONE, 16BIT or 24BIT word length.