Eq Bands 1; Eq On; Eq Flat, Eq Default - Yamaha LS9 User Manual

Yamaha Commercial Audio
4.6.2 EQ Bands 1 & 4
EQ bands 1 & 4 have additional choices of band-type. Both these
bands can be a shelf or a bell, and band 4 can also be a Low Pass
Filter. Band 1 can also be a HPF for Mix, Matrix and Stereo/Mono
Master channels. When one of these bands is selected, the relevant
additional buttons are shown above the EQ graph.

4.6.3 EQ ON

The channel EQ can be switched on/off with the [EQ ON] button
towards the top-right of the EQ graph. It is green when the EQ is on.
When the EQ is switched off, the EQ curve will be grey.

4.6.4 EQ FLAT, EQ DEFAULT

These two buttons, above the EQ curve perform the same function as
those on the LS9 console. [FLAT] will set the Gain of bands 1-4 to 0dB,
but will not change the Q and Frequency values. [DEFAULT] will reset
all EQ parameters for the selected channel back to their default values,
including HPF.
After pressing one of these buttons, an "Are You Sure?" pop-up will be
displayed before the action is executed (or cancelled).
To exit from the EQ window and return to the Mixer window, press the
[MIXER] button at the top-right of the display.
LS9 StageMix V1.0 User Guide
Page 19