Chapter 8: Fairchild Plug-ins 25
Fairchild 670
(TDM and RTAS)
Bomb Factory’s no-compromise replica captures
every detail of the Fairchild 670. The Fairchild
670 is a dual-channel unit and, as such, is only
available on stereo tracks.
Note that the companion Fairchild 660 also sup-
ports stereo operation. Bomb Factory modeled
both a Fairchild 660 and a Fairchild 670 from
scratch using two different hardware units. This
gives you a choice of two different-sounding
Fairchild units to try on your stereo tracks!
How the Fairchild 670 Works
The Fairchild 670’s internal design is similar to
the Fairchild 660. However, the Fairchild 670 of-
fers two channels of compression instead of one.
Combined with the AGC control, this gives you
even more compression options on stereo
tracks.
How the Fairchild 670 is Used
Input Gain Sets the input level to the unit and
the compression threshold, just like the Input
control on an 1176. Full clockwise is loudest.
Threshold Adjusts the gain to the sidechain, just
like the Peak Reduction control on an LA-2A.
Adjust the Input Gain and Threshold controls
together on both channels until you get the
sound you want. Like many classic compressors,
after a little bit of tweaking, you’ll know imme-
diately when you get it right.
Time Constant Selects the attack and release
times. One is fastest, and six is slowest. Seven
and eight are Bomb Factory custom presets. See
“Fairchild 670” on page 25 for details on these
custom settings.
AGC Lets you select Left/Right processing or
Lat/Vert processing of the two channels.
Left/Right works like a dual-mono compressor
with separate controls for the left and right
channels. In Lat/Vert mode the top row of con-
trols affects the in-phase (Lat) information and
the bottom row of controls affects the out of
phase (Vert) information. Although originally
designed for vinyl mastering where excess Vert
(vertical) information could cause the needle to
jump out of the groove, you can use the Lat/Vert
mode to achieve some amazing effects – espe-
cially on drums.
Tips and Tricks
To exactly match the settings between channels,
hold down the Alt key (Windows) or the Shift
key (Mac) while dragging the mouse. This is use-
ful when trying to preserve the existing
Left/Right balance on stereo material.
Fairchild 670
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