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Compressor
Square ONE Dynamics 21
Lo-Q frequency-conscious compressor
In the Lo-Q frequency compression mode the compressor operates at a selected frequency over a wide
bandwidth rather than over the whole signal.
To set up the compressor for Lo-Q operation, activate the side chain filter for wide bandwidth by enabling the
FILTER switch and disabling the NARROW switch, then select the required frequency using the SIDE
CHAIN FREQUENCY control knob.
Hi-Q frequency-conscious compressor (de-esser)
In the Hi-Q frequency compression mode the compressor operates at a selected frequency over a narrow
bandwidth rather than over the whole signal. Also known as the “de-esser” mode, this method of
compression can be used for effects, such as de-essing and de-popping; see “De-essing” on page 26.
To set up the compressor for Hi-Q operation, activate the side chain filter for narrow bandwidth by enabling
the
FILTER and NARROW switches, then select the required frequency using the SIDE CHAIN
FREQUENCY control knob.
Limiter
A limiter is essentially an extreme form of compressor that only affects signals above a selected threshold
level (dB). This is particularly useful for limiting only peaks in the signal, while leaving the rest of the signal
alone. A limiter acts as a last check on signal level. If the level goes over threshold, fast acting, high ratio
compression is applied to bring it back within bounds.
To set up the Square ONE Dynamics as a limiter, select compressor to operate in vintage and hard knee mode
with attack set to fastest and the ratio set at infinity to one. Adjust release to suit programme and set
threshold as required.
Figure 9: Compression - limiting signal level graphs
Threshold level
Signal le
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Limiting
Time
Unprocessed
Time
Signal le
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signal
Threshold level