Scott wired his prototype so that the meter
was ALWAYS indicating gain reduction for two reasons: to simplify
connections and because he rarely uses a compressor's output meter when
interfaced to a an external VU via console.
If you'd like to add a switch so that your
meter can read Gain Reduction as well as Output, connect the meter
to the wipers of a Double-Pole, Double-Throw (DPDT) switch. Connect one
side of the switch to side-chain PCB and the other switch contacts to the
NOTE: A driver amp may be required
between the output circuit and th emeter for several reasons, such as calibration
and isolation / buffering (so the meter will not add distortion to the
This page will be updated to detail the
procedure and options.
Modutec Meters from Mouser, Part Number 541-MSQ-AVU-AW