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TUBE COMPOSER T1952
1.3 Control elements
Fig. 1.1: Front of the TUBECOMPOSER
The BEHRINGER TUBECOMPOSER has two identical channels. Each channel is equipped with 7 toggle
switches, 9 rotary controls, 6 LEDs and 2 VU meters. The CH 1 MASTER switch is for stereo operation:
Fig. 1.2: Expander/gate- and compressor section
1
The TUBECOMPOSER converts to stereo mode by engaging the CH 1 MASTER switch, where the left
channel assumes the control of both audio channels, i.e. the control signal of channel 2 is replaced with
that of channel 1. By pressing the CH 1 MASTER switch, you override all the controls and switches of
channel 2 with the exception of the IN/OUT, SC MON, SC EXT, SC Filter switches and WARMTH
control as well as the PEAK LIMITER control. The controls of channel 1 take over all functions of
channel 2.
2
Use the THRESHOLD control to determine the threshold point below which expansion occurs. The
range of this control is from OFF to +15dB. Signals above this threshold value pass unaltered, signals
below the threshold value are reduced in level according to the adjusted RATIO value. Adjust this control
so that music signal can pass but that noise is faded out. The THRESHOLD can be set with the help of
the LED above the control. When the signal falls below the threshold - lights up, signalling that the
expander is attenuating the signal. If the + LED lights up, the signal level is above the set THRESHOLD
value and the signal is not processed by the expander.
3
The RATIO control is used to adjust the expansion ratio when the signal drops below the threshold
value. This control determines whether the unit works as an expander (low ratio level) or as a gate (1:8).
The expansion ratio can be set from 1:1 to 1:8. Higher values lead to harsher suppression while smaller
RATIO values lead to a gentler correction:
4
When the signal level is below the set threshold value, the - LED lights up. The + LED lights up when
the signal level is above the set THRESHOLD value.
5
To optimally adapt the expander/gate to the program material, the RELEASE switch allows for selecting
a SLOW or FAST release time. When you engage this switch, the expander responds with a slow
release. As a general rule, percussive material with little or no ambience is processed using the FAST
release mode, whereas signals with long decay or with heavy ambience require the SLOW release
mode.
1. INTRODUCTION