Instruments and Effects

Chapter 4 Dynamics 75
Using the Multipressor
In the graphic display, the blue bars show the gain change, not only the gain reduction
as in a standard compressor. The gain change displayed is a composite value of the
compression reduction + expander reduction + auto gain compensation + gain make-
up.
Compression Parameters
The Compression Threshold and Compression Ratio parameters are the key parameters
used to control compression. In most cases, the most useful combinations of these two
settings are either a low Compression Threshold with a low Compression Ratio, or a
high Compression Threshold with a high Compression Ratio.
Downward Expansion Parameters
The Expansion Threshold, Expansion Ratio, and Expansion Reduction parameters are
the key parameters for controlling downward expansion. They determine the strength
of expansion applicable to the range that you wish to expand.
Peak/RMS, Attack, and Release Parameters
Adjusting the parameter between Peak (0 ms, minimum value) and RMS (Root
Meantime Square –200 ms, maximum value) is dependent on the type of signal you
would like to compress. An extremely short Peak detection setting is suitable for
compression of short and high peaks of low power, which do not typically occur in
music. The RMS detection method measures the power of the audio material over time
and thus works much more musically. This is because human hearing is more
responsive to the overall power of the signal than to single peaks. As a basic setting for
most applications, the centered position is recommended.
Output Parameters
The Out Gain slider sets the overall output level. Set Lookahead to higher values when
the Peak/RMS fields are set to higher values (further towards RMS). Setting Auto Gain to
On references the overall processing to 0 dB, making the output louder.