Buzz Audio dbc-20diode bridge compressor - Manual (Page 4)

④
4] Controls and Indicators
The DBC-20 has two channels with identical controls. The DBC utilizes silicon
diodes in a transformer coupled balanced arrangement as the gain reduction
element and has a unique self-adjusting ratio control.
COMPRESSION
This control adjusts the amount of signal sent to the side chain circuit and
therefore the amount of gain reduction (or compression) applied to the input
signal. Clockwise rotation increases the amount of gain reduction. Note that as
the amount or depth of the compression is increased, so does the compression
ratio and it will vary from about 2:1 up to 10:1 from threshold to about 15dB of
gain reduction.
GAIN
Adjusts the post compression make up gain to bring the output level back up to
the desired volume. Clockwise rotation increases gain from 0dB to approx.
+15dB of gain.
ATTACK
This switch has 6 positions and adjusts the time taken for the DBC to respond to
signals that exceed the threshold (as set with the Compression control). This is
the time taken (in milliseconds) to achieve about 15dB of gain reduction. The
FAST position has an attack time of less than 0.5 milliseconds and is slightly
dependent on the input signal.
RELEASE
This 6 position switch sets the time taken (in 100’s of mS) for the DBC to release
from 15dB gain reduction. The AUTO position has a clever circuit that releases
from short transients (like percussive sounds) quickly but will be slower on more
constant signals (bass guitar for example). Using fast release times may cause
audible distortion with some signals, especially low frequency sounds.
GR METER
The 15 led bar graph display is used to indicate the amount of gain reduction
and it has a fast response so you can clearly see how much compression is
being applied.