The Unicomp Control Functions - Alta Moda Unicomp Operator's Manual

The Unicomp Control Functions

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Control Functions
1. THRESHOLD - Adjusts the signal level point at which compression
begins. Turning the control clockwise raises this set point. The range
of this control varies depending on operational mode selected.
Typically, its range varies between -44dB to +25dB as control is turned
clockwise.
2. DETECT – When illuminated, indicates that the signal threshold has
been passed and that compression is occurring.
3. RATIO – Sets compression ratio; i.e. the ratio of the input level
needed to increase the output level a specific amount.
4. KNEE – Affects how compression engages once the signal passes the
threshold point. When selected to "HARD", compression starts immediately
as the signal passes the threshold point. When the switch is in the
"SOFT" position, the compression actually starts somewhat below the
threshold point and increases gradually as the signal level increases.
The threshold control moves the range over which this occurs.
5. RMS/PEAK – When switch is out, the detector is in RMS mode. RMS stands
for root-mean-square, and is a mathematical averaging of the detected
signal. In this mode, the detector is responding to the average level
of the signal. When the switch is depressed (illuminated), the detector
is responding to the peak level of the signal. The detector also
responds faster while in peak mode.
6. ATTACK – Sets the amount of time before the compressor reacts to the
signal. Turning clockwise increases the amount of delay. This is a
dynamic control which is affected by other control settings and modes.
7. FEEDBACK – Selects whether detector is receiving signal pre or post
of the gain cell. When the switch is out, the detector receives signal
pre-gain cell (FEEDFOWARD). When the switch is in, the detector receives
signal post-gain cell (FEEDBACK).
7 H I G H P E R F O R M A N C E A U D I O