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TUBE COMPOSER T1952
Threshold
Gain 0 dB
Input
Output
1:oo
Noise Gate,
Expander, 1:8
IRC-Curve
Fig. 2.1: IRC curve characteristic of the expander
The result is expansion, which is less critical to adjust and which is more tolerant of useable signals, whose
level is slightly above that of the noise floor. Expansion therefore occurs extremely soft with low ratio settings,
while the known negative effects of expansion are inaudible. The attack time of the IRC expander is set
automatically and program-dependent, i.e. extremely short for quickly changing signals and slower for a more
balanced program material. Since the expander/gate adapts itself automatically to the program material, you
will note that the new IRC (Interactive Ratio Control) circuit produces considerably better results than
conventional expanders.
Basic settings of the expander/gate section
Adjust the control elements of the TUBE COMPOSER in accordance with the following table. This will switch
off all functions except the expander section.
Control element Setting
THRESHOLD control of the expander section OFF
RELEASE switch SLOW REL.
RATIO control of the expander section 1:2
IN/OUT switch IN
SC EXT switch OFF
SC MON switch OFF
THRESHOLD control of the compressor section +20 dB
AUTO switch AUTO
OUTPUT control 0 dB
LIMITER control OFF
WARMTH control COLD
Tab. 2.1: Basic settings of the expander/gate section
Begin with very low threshold levels, so that the signal can pass through the unit unaffected. Now turn the
control clockwise until all unwanted noise is removed and only the sound of the desired instrument can be
heard.
To adapt the unit to the program material properly, you can additionally choose between a SLOW or FAST
release time. In the depressed position, the unit works at a slow release time. Percussive material with little or
no reverb, is processed in fast mode, whereas the slow mode is advantageously used for signals with long
durations or signals with heavy ambience. You will find that a fast release time (FAST mode) is preferable for
acoustic separation of most percussive sounds, whilst cymbals and tom toms, normally benefit from the
SLOW mode.
The RATIO control determines the ratio between input and output level, for all signals below the selected
threshold point. Use this control to determine whether the section works as an expander or as a gate (ratio
1:8).
2. OPERATION