Input Channel − Dynamics (Compressor / Agc); Compressor - QSC MP-M80 User Manual

Input Channel − Dynamics
(Compressor / ANC)
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 / ANC button – Selects either
Compressor or AGC.
3. In switch – Engages and disengages the
Compressor or AGC processor.
4. button –
Knee In
Determines how
abruptly or gradually the
compressor transitions
in and out of gain
reduction as the threshold
is crossed.
5. button – Turns Simple mode on and off.
Simple
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. button – Sets all the Compressor and AGC controls, for this channel, to their factory default position.
Reset
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.
• 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
Release
the threshold.
11. Threshold slider – Sets the point at which the compressor begins to reduce signal level.
12. slider – Adjusts how quickly the compressor reacts to a signal that exceeds the threshold.
Attack
13. slider – Adjusts how quickly the compressor stops compressing when signal falls below threshold.
Release
14. slider – Sets the ratio of input level change to output level change when the signal exceeds the threshold.
Ratio
15. Nain 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.
TD-001578-01-C
B C
Knee
E
In Out
Inputs
1
3
2
7
8
11
10
12
D A
13
14
15
13
Touch a Channel
Touch an Input Bank
Dynamics Button
Mic/Line
(RCA / More)
4 5 6
9
16