Thermionic Culture THE PHOENIX Mastering Plus - Manual (Page 9)

©Thermionic Culture Ltd, August 2011 8
3.8 Sidechain
The sidechain filter operates only on the control
voltage part of the Phoenix, it is not in the signal path
so no audio that you will hear has passed through it.
The sidechain filters operate as high pass filters
operating at either 150Hz or 300Hz. This is denoted
by the symbols for high pass filtering on the control.
In use the filters will alter the response of the Phoenix
to bass frequencies. The compression will become
less responsive to bass frequencies either below
150Hz or 300Hz, depending on the position of the
switch.
It’s worth noting that as the Phoenix has a true stereo
link, it is possible to set the sidechain control in a
different position on each channel. The result will be
an average of the two settings when in link mode. So if
channel 1 has a sidechain control set at 150Hz and
channel 2 has a sidechain control set at 300Hz,, the
overall sidechain response will be a high pass filter at
225Hz.