User Manual

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User’s Guide ADI-2 Pro - v 1.91
13. EQ
The key EQ brings up a graphical EQ screen (Bode plot) to
set the EQ quickly and with full overview. It is available on
all analog I/Os. The I/O - Settings submenu Parametric EQ
mirrors the settings done in this screen.
On the top level, turn encoder 1 to change between Analog
Input, Main Output 1/2 and Phones Out 3/4. Turning
encoder 2 will scroll through all 5 bands, as can be seen in
the parameter line. This function allows to see/check/verify
all parameters of all bands quickly, without the danger of
changing any of them.
Push encoder 2 to move the cursor to the parameter line,
with all values shown in white color. It is now possible to
adjust all parameters by turning the three encoders. The
Volume knob changes Gain, encoder 1 Frequency,
encoder 2 Q (Quality factor). All changes are shown in real-
time as frequency response curve, making it very easy to
find the desired settings.
To change to the next band push the encoder Volume.
The five bands have different colors to clearly show what is currently selected: band 1 red, band
2 yellow, band 3 green, band 4 light blue, band 5 dark blue.
Band 1 and 5 also allow to set the filter to Peak or Shelf mode, plus Hi Pass/Hi Cut. This func-
tion is accessed by pushing encoder 2 so that the cursor moves down to the small filter symbol
in the lower right. It is no longer grayed out. Turning encoder 2 now toggles through the avail-
able settings, with the symbol changing according to the selected function.
Another push on encoder 2 changes to the graphical EQ
Preset selection screen. Turning encoder 2 will scroll
through all available EQ presets with the frequency
graphics showing the respective curve, and the parameter
line showing the preset name. In this screen Volume, vol-
ume selection and channel selection (encoder 1) are also
available.
Notes
The frequency graphics give a precise overview of the filter results. Overlapping filters influence
each other. This can be used to achieve more than 12 dB gain, or to generate difficult frequency
response optimizations.
The ADI-2 Pro has an internal headroom of 24 dB. Extreme boosts with overlapping filters could
cause an internal overload. Such an overload will be visible as it is displayed by the level meter
below the EQ, as well as the channel’s level meter. Reducing the output volume will prevent
any clipping as long as the headroom of 24 dB is not exceeded. In real-world operation that is
always the case, the ADI-2 Pro will not distort internally.
The EQ can cause distortion for the digital outputs when used on the Analog Input. Again the
level meters will clearly show this error condition. Reduce the input’s sensitivity by selecting a
higher Reference Level in such a case.