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A RATIO of
∞
:1 effectively means that there is no increase in output level once
the input signal has reached THRESHOLD reference i.e. limiting. The following
diagrams shows the difference between HARD and SOFT knee compression at a
number of different RATIOs. THRESHOLD in the diagrams is set to 0dB.
Fig 2.1: HARD knee compression
Fig 2.2: SOFT knee compression
2.5
AUTO-MAN
switch
In the AUTO mode (switch out), Attack and Release times are automatically
adjusted and are dependant on the dynamic content of the input signal.
AUTO mode has been designed to work with a wide range of vocal, instrument
and program sources and can therefore be used in most applications without
need to adjust attack and release times.
In MAN (manual) mode (switch in) Attack becomes program dependant and the
Release time is manually adjusted using the RELEASE control.
2.6
KNEE
switch
Selects between HARD and SOFT knee compression curves - see Fig 2.1 and
Fig 2.2.
SOFT knee gives a gradual onset of compression and can provide subtle and un-
obtrusive level control.
