Alesis DEQ830 Service Manual page 7

mode, in which the unit serves as a visual aid for analyzing the
audio signal. In this mode, the Band Gain LEDs "dance to the
music," displaying the relative strengths of the various frequency
ranges passing through the DEQ830.
Channel Select
To the right of the [POWER] button, you'll see the
[CHANNEL SELECT] buttons. These eight buttons are used
for selecting a channel for which the EQ settings will be displayed
on the 30 Band Gain LEDs. The [CHANNEL SELECT]
buttons are also used when you are creating Link Groups.
Monitor Select (INPUT/OUTPUT)
This button, located immediately above the [BYPASS] and [ALL]
buttons, toggles between INPUT and OUTPUT to determine
whether the Channel Meters are displaying the input or output
levels. The green LEDs above this button indicate which
monitoring method is currently selected.
Bypass
When you press this button, a red LED will light immediately
above the currently selected channel. This means the DEQ830 is
in Bypass mode for that channel. As long as this LED is lit,
incoming audio will pass through that channel without being
affected by its EQ settings. Also, if you're on a linked channel
when you press the [BYPASS] button, all of the linked channels
will bypass at the same time. Bypass mode is useful for comparing
the "equalized" signal with the original signal so you can decide if
you like the edit you made. Press the button again to get out of
Bypass mode and hear the effect.
Bypass All (ALL)
This button is located just above the [BYPASS] button. It will
toggle the Bypass status of all eight channels at once. The first
press of the [ALL] button will cause any un-bypassed channels to
enter Bypass mode, after which all eight channels will change their
Bypass status together. When you press this button, the red LED
below each channel meter will light. Press it again to return all
eight channels to their effected state.
Link (PUSH TO LINK)
This button is used to link channels together so that their EQ
settings are "mirrored." Any edits you make to a band on the
original channel will also happen to that same band on all linked
channels. This is useful for quickly setting up a program without
having to make independent adjustments for each channel.
Store
Once you have made a program edit you would like to keep, press
this button to enter Store mode. From there you can use the
[VALUE] encoder to select one of the 100 memory locations to
become the new home for the edited program.
Compare
This button will help you if you are editing a program and would
like to hear how the program sounded before you edited it.
Pressing this button will temporarily recall the original program,
and pressing it a second time will restore the edited program. The
green LED above this button lights to indicate that the Band Gain
LEDs are now showing the EQ curve as it appeared before your
edits.
Utility
If you press [UTILITY] while you are in Program mode, you will
enter Utility mode, which lets you edit the Master Level, MIDI
Settings, the internal clock rate and other global parameters. If you
press this button at startup as the DEQ830's splash screen is
displayed, you will enter Lock mode. This mode allows you to lock
the front panel buttons.
Save Curve
Press [SAVE CURVE] to save a channel's EQ curve to the
DEQ830's curve bank so that it can be retrieved at a later time.
We've provided 100 locations (00-99) in which to save curves.
Curves 00-49 contain factory presets, and curves 50-99 are blank.
Any of the 100 curves may be modified and saved.
Program
If you want to cancel any action in progress and return to
Program mode, just press the [PROGRAM] button.
Value Encoder (VALUE)
To the far right side, you'll see the [VALUE] encoder, which is
used to edit the gain amount of the frequency you have selected
with the [BAND SELECT] buttons. (It is also possible to select
and edit several frequencies at once; more about this later.) The
[VALUE] encoder is also used for all sorts of data entry, such as
selecting programs and curves, changing global parameter values
and so forth. Changes made with the [VALUE] encoder are
reflected in the Numerical LED Display to the left of the knob.
Numerical LED Display
The three-digit LED display you see to the left of the [VALUE]
encoder is always showing either a value or an abbreviated name.
To help you know at a glance what sort of information the display
is giving you, there are three green LEDs immediately below the
Numerical LED Display:
PROG
If this LED is lit, this means the value in the
display is a program number. You will see this
when the unit is in Program mode or Store
mode.
CURVE
When lit, this LED indicates that the number
in the display is telling you which curve has
been chosen.
dB
This LED tells you that the value in the
display pertains to a gain change.
The only time that none of these LEDs will be lit is when the
DEQ830 is in Utility mode.