Metric Halo ChannelStrip 2 - Manual (Page 29)

ChannelStrip User Guide
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to some external event (this allows the compressor to be
used like a ducker or for other creative effects).
Often, you will want to compress the signal before you
equalize it. Sometimes you will need to equalize the signal
before you compress it. ChannelStrip provides that flexibility
with the “Post EQ” button. This is a very important part of
ChannelStrip because it allows you to test different process-
ing scenarios quickly and easily. It also allows you to com-
pare the two different approaches without having to stop the
transport so you can get a much more visceral comparison.
T HEORY OF O PERATION
The operation of the compressor is very similar to the gate.
Based upon your setting for the sidechain routing switch,
either the Pro Tools sidechain input signal or the channel sig-
nal is fed to the sidechain filter. The sidechain filter provides
one band of equalization that may be used to accentuate or
cut certain frequencies (parametric or shelf filters) or limit
the key to a certain range of frequencies (cut or bandpass fil-
ters). You control the filter type and the filter parameters with
the filter type button and the “dB”, “Hz” and “BW” knobs.