QSC MP-M40 - Input Channel − Dynamics (Compressor; AGC); Compressor

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TD-001578-01-C
Input Channel − Dynamics
(Compressor / AGC)
The Input Channel Dynamics processing block may
be configured as either a Compressor or an Automatic
Gain Control (AGC).
Compressor
The Compressor controls the dynamic range of a signal
above a setThreshold.
1. Dynamics button – Selects the Compressor / AGC
screen.
2. Compressor / AGC button – Selects either
Compressor or AGC.
3. In switch – Engages and disengages the
Compressor or AGC processor.
4. Knee In button –
Determines how
abruptly or gradually the
compressor transitions
in and out of gain
reduction as the threshold
iscrossed.
5.
Simple button – Turns Simple mode on and off.
When on, it hides all controlsexcept:
• Compressor / AGC
• Comp In
• Simple
• Reset
• Compression (Threshold)
All other controls remain at the value set prior to engaging the Simple mode button.
6. Reset button – Sets all the Compressor and AGC controls, for this channel, to their factory defaultposition.
7. Input meter – Displays the RMS input signal level.
8. Reduction meter – The red display indicates how much the signal is being reduced by the compressor. This meter displays a signal regardless
of whether the In button is engaged or not.
9. Output meter – Output level after any applied compression
10. Compressor graph – Vertical scale from 0 dB to -60 dB; horizontal measurement is time. When engaged, the trace displays.
• Threshold (A) – The level at which compression begins.
• Attack time (B to E) – The time it takes for the compression to reach its maximum compression after the input exceeds the thresholdlevel.
•
Ratio (A to E) – The amount of compression applied to the signal.
• Release time (C to D) – The time it takes for the compressed signal to rise to the threshold level once the input level no longer exceeds
thethreshold.
11. Threshold slider – Sets the point at which the compressor begins to reduce signal level.
12. Attack slider – Adjusts how quickly the compressor reacts to a signal that exceeds the threshold.
13. Release slider – Adjusts how quickly the compressor stops compressing when signal falls below threshold.
14. Ratio slider – Sets the ratio of input level change to output level change when the signal exceeds the threshold.
15. Gain slider – Adjusts the overall output gain to makeup any loss after the signal is compressed.
16. Compressor in/out indicator – When the Compressor (or AGC) is In, an orange “ C ” displays on the channel controls strip.
Inputs Touch an Input Bank
Touch a Channel
Dynamics Button
Mic/Line
(RCA / More)
B
E
C D A
3
4
1
15
10
9
6
8
11
5
16
12
13
14
2
7
Knee
In
Out