Input Monitor; Auto Input Monitor; All Input Monitor - Alesis ADAT-XT20 Reference Manual

Chapter 4: Basic Operations
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The Input Monitor controls consist of two buttons: [ALL INPUT] and [AUTO
INPUT].
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This feature determines what you will hear from the XT20's output
jacks when a track is record-enabled (REC LED flashing): tape, or
source. The [AUTO INPUT] button toggles the Auto Input Monitor on
and off. When a track is monitoring its input signal, its INPUT LED
will be lit.
When the Auto Input Monitor is off (AUTO icon in the INPUT
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MON icon group is off), all record-enabled tracks will monitor the input
signal and all other tracks will monitor the taped signal.
• When the Auto Input Monitor is on (AUTO icon is lit), it allows
input monitoring of record enabled tracks while in record, stop, rewind
or fast fwd; but not in play.
The reason for having these two options is to accommodate different
stages of the recording process. Leaving the Auto Input Monitor off is
the "normal" option and is what you would use when first recording
tracks. When performing punch-ins and overdubs, you will probably
want to turn the Auto Input Monitor on so that you can hear what was
recorded on tape for a given track right up to the point you want to
punch in. As soon as the XT20 punches into record mode, the tape signal
is replaced by the input signal so you can hear what's being recorded to
tape. After you punch-out, the monitor reverts to tape.
Typically, Auto Input should be on when the Rehearse feature is used
(see page 69).
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When the [ALL INPUT] button is on (ALL icon in the INPUT MON icon
group is lit), the Auto Input Monitor setting is overridden so that all
tracks monitor their input signals regardless of their record enable
status. All eight track INPUT LEDs will be lit. When All Input
Monitor is off (ALL icon is off), the Auto Input Monitor setting
determines track monitoring.
The All Input Monitor will automatically be turned off if Track Copy
mode is enabled (by pressing the [TRACK COPY] button (see previous
page).
The following table indicates the status of tracks that are record-
enabled and tracks that are not depending on the status of the [AUTO
INPUT] and [ALL INPUT] buttons.
ADAT XT20 Reference Manual