Input Select; Digital Input; Clock Source Settings When Recording The Digital Input; Using All Input - Alesis ADAT-HD24 Reference Manual

Input Select

A single
INPUT SELECT
display) selects what source will be recorded: the
or
ANALOG DIGITAL
input source is indicated in the lower left corner of
the display.
When
INPUT SELECT
looks to the 1/4" analog inputs on the rear panel
for its inputs. When
the HD24 gets its input from the ADAT Optical
Digital Inputs.
Input Normalling (internal patching)
While the
INPUT SELECT
channel record and input status indicators no
longer indicate the current record or input status,
and the REC icons turn off. As long as the button is
being held, the track INPUT LEDs are used to
indicate the Input Normalling status.
There are five different Input Normalling modes: 2-
input, 4-input, 8-input, 12-input, and 24-input.
Input Normalling works the same in both analog
and digital input modes. For more information
about setting Input Normalling modes, see page 22.
✪
In 2-input mode, inputs 3-24 are
disconnected and cannot be recorded or
heard. In 4-input mode, inputs 5-24 are
similarly disconnected. To use all inputs, 24-
input mode must be selected.

Digital Input

To record from the digital input, press the
button until
SELECT
INPUT icon in the display. The digital input can be
used to record from any ADAT-compatible optical
signal. All twenty-four channels will be received
via the fiber optic connections (see Digital In/Out in
Chapter 3) and the analog inputs will be ignored.
If you don't get any input to a track, or get a
different input than you expect, check the input
normalling feature described above by holding the
button.
INPUT SELECT
ADAT HD24 Reference Manual
button (just below the
input. The currently selected
is set to , the HD24
A N A L O G
is set to
INPUT SELECT DIGITAL
button is being held, the
lights up under the
DIGITAL
chapter 3 • basic recording and playback
Clock Source settings when
recording the Digital Input
It's important to set the correct
when using Digital Input:
• When digitally recording from a source
whose input is set to Internal, set the HD24's
Clock Source to Optical.
• If you're using a master clock source for all
,
digital components of your studio, set the
Clock Source to Word. Connect a BNC cable
between the Word Clock (48kHz) output of
the master clock and the
HD24.
• If the HD24 has its ADAT Sync Input
connected to another ADAT's Sync Output or
is controlled by a BRC, the Clock Source
mode will automatically be set to ADAT.
If the Clock Source button is pressed and there is
no valid digital input, the Clock Source icon will
flash, indicating lack of a clock signal, and the
clock will default to INTERNAL.

Using All Input

The
ALL INPUT
hear what is coming into the ADCs (or digital
inputs), despite the state of the track record
enable buttons.
Pressing the
toggle between On and Off states. When On, all
analog or digital outputs that are active for a
given song (6 in a 6-channel song, 24 in a 24-
channel song, etc.) will always receive audio from
INPUT
either the Analog or Digital inputs, and the Input
segments of the Level Meter Display light for all
24 channels. When Off, the DACs derive their
audio either from the Hard Disk, or from the
Analog or Digital inputs, or are muted,
depending upon the state of the record enables
and the state of the transport. In addition, the
Input segments of the Level Meter Display are
extinguished when All Input is Off.
CLOCK SOURCE
WORD IN
button allows the user to quickly
button will cause it to
ALL INPUT
jack of the
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