Filters & Peq - QSC MP-M80 User Manual

Filters / PEQ
The Filters / PEQ screen provides the tools to create
custom speaker presets.
The PEQ is a 6-band, fully parametric EQ that includes
variable HPF (High Pass Filter) & LPF (Low Pass Filter) and
High and Low Shelving Filters.
1. PEQ button – Selects the EQ screen.
2. Presets In – Engages / disengages the equalizer.
3. Filters / PEQ button – Opens or closes the Filters /
PEQ screen.
4. LPF/HPF button – Available only when the Filters / PEQ
screen is open. Touch to display a dialog for setting the
HPF and LPF slope and type.
a. Select either Butterworth or Linkwitz-Riley for both LPF
and HPF.
b. Select the slope per octave: 12 dB, 18 dB, or 24 dB
for each.
c. Touch the Close button to close the dialog box.
Changes are saved.
5. RTA On – Engages / disengages the real time analyzer
that displays the tonal balance of the channel's signal
including peak hold indicators.
NOTE!: Only one RTA may be running on the system at a time. Touch the RTA button. If
another device is using the RTA, the message "The RTA is currently being used
by (device name) Do you want to assign it instead to this device?"
NOTE!: When the RTA is off, the Parametric EQ graph expands to use the entire
graph area.
6. Simple button – Hides the Frequency, and Q controls for all bands and low and high cut fi lters.
Changing to Simple mode does not affect existing settings.
7. Reset button – Sets all the PEQ controls to their factory default position.
8. RTA display – Displays the amplitude of the channel signal in 1/3 octave bands. Peak hold indicators are
displayed for each band. The vertical scale represents audio level from -60 dB to -5 dB. The horizontal scale represents frequency from 31.5 Hz to 16 kHz.
9. Parametric EQ graph – A graphic representation of the equalization curve based on the PEQ settings. The trace dims to indicate that the PEQ is
Out (disengaged). The vertical scale represents audio level from -20 dB to +20 dB. The horizontal scale represents frequency from 20 Hz to 20 kHz.
10. EQ handles – Touch, hold, and drag to change the Frequency and Gain of the associated PEQ band. The frequency band button must be engaged to see
the handles.
11. High Pass and Low Pass buttons – Engages / disengages the HPF and LPF. The HPF is variable with a range of 20 Hz to 2,000 Hz. It passes
frequencies above the setting while cutting those below. The LPF is variable with a range of 1 kHz to 20 kHz. It passes frequencies below the setting while
cutting those above.
12. Low Shelf and High Shelf fi lter buttons – Changes EQ Band 1 and Band 6 from parametric fi lters to shelving fi lters. When a shelf fi lter is engaged,
the Q control is not available. The low shelving fi lter raises or lowers a range of frequencies below the set frequency. The high shelving fi lter raises or
lowers a range of frequencies above the set frequency. Bands 1 and 6 and their respective shelving buttons must be "on" for the shelving fi lters to work.
13. Frequency Bands 1, 2, 3, 4, 5, and 6 buttons – Engages / disengages the associated parametric EQ band. Each band is fully parametric with a
frequency range of 20 Hz to 20 kHz.
14. Nain control knob and readout – Adjusts the gain at the frequency setting of the associated EQ band. Range of -15 dB to +15 dB.
15. Freq control knob (Frequency bands 1 – 6) – Sets the center frequency of the associated EQ band. If the Shelving fi lter is engaged, the Freq control sets
the knee frequency of the shelf fi lter.
16. Q knob – Adjusts the Q of the associated EQ band. When the Shelf Filter is selected, the Q control is hidden. In addition, Q can be adjusted by "pinching".
17. Freq control knob (Low and High Cut) – Sets the frequency of the low and/or high cut fi lter as measured from a point 3 dB below 0 or unity.
TD-001578-01-A
Outputs Touch Zones
Zones
1
2 3
8
9
10
11 12
17
30
Touch a Channel
Presets Button
4 5 6 7
13 12 11
14
15
16 17
Touch
Filters / PEQ
Button
Filters / PEQ
1
2
3