Crane Song TRAKKER - Manual (Page 7)

of a wide variety of sounds possible only because of a proprietary gain control device used in
Crane Song compressors.
KNEE CONTROL
The knee control changes the shape of the knee or gain curve. With the control set to 0 the
curve and slope are gentle. With the control set to 10 the curve is more aggressive and the
slope is higher. Be aware that as the knee setting becomes higher the attack and release
times are modified, they are made faster. The gain curve is the input - output signal relation-
ship from which the ratio can be determined. By looking at the knee graph below it is evident
that the ratio changes depending upon where on the gain curve the unit is operated.
BYPASS SWITCH
The bypass switch selects the output signal source. When switched to "in" – the unit is in the
audio path. When switched to the "out" position, all of the compressor circuitry is removed
from the audio path. When in the "out" position, the unit is hardwired to the output, i.e. hard
bypassed. The compressor-limiter, however, continues to operate in a monitoring mode. The
unit defaults to the bypass (out) state when the power is turned off or when the power fails.
METER
The meter has two modes of operation; output and gain reduction. In the "out" mode the
meter appears as a bar graph. 0 VU is referenced to +4dBm. The "gr" mode shows gain
reduction and appears as a dot type display. The red CLIP LED indicator lights when the unit
is clipping in the output stage on either of the two settings.
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KNEE & INPUT/OUTPUT GAIN RELATIONSHIP GRAPH
A
B
C
D E
F
Graphs A,B, & C Graphs A,B, & C Graphs A,B, & C Graphs A,B, & C Graphs A,B, & C show hard knee settings;
A & B A & B A & B A & B A & B with the knee control set to 10, CCCCC with
the control set to 0.
Graph A Graph A Graph A Graph A Graph A shows 10dB of Gain reduction
with an input of +25 dBm.
Graphs B & C Graphs B & C Graphs B & C Graphs B & C Graphs B & C
show 15 dB of Gain Reduction with the input
at +25dBm.
Graphs D,E, & F Graphs D,E, & F Graphs D,E, & F Graphs D,E, & F Graphs D,E, & F are in the non-hard knee
settings.
Graph E Graph E Graph E Graph E Graph E shows 15 dB of gain
reduction when the input is +25dBm with
the knee control set to 0.
Graphs D & F Graphs D & F Graphs D & F Graphs D & F Graphs D & F
show 15 or 20dB of gain reduction with the
maximum input and the knee control set to
10.