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ADAT Blackface duplicate signals
Thu, 10/07/2004 - 15:36
I am using an ADAT Blackface version 4.03. My problem with the ADAT is that when I send an audio signal to Track 1 on the ADAT, the signal is also present at Track 5. If I send a signal to Track 2, it is duplicated at Track 6, etc. Is there a setting to correct this behavior or is something wrong with the ADAT?
Thu, 10/07/2004 - 16:23#1
Weird, since Alesis did not introduce internal digital track routing until a later model. Did you try resetting it by holding down "record" and "play" while powering it up? Is there a BRC involved and another ADAT? If so, reset it too.
Here's something from the manual which may or may not be interesting:
8.1F Monitor/Audio Path Select
Hold SET LOCATE and press ALL INPUT. Toggles between two options: "In" and
1 "In" - input channel audio comes directly from input, while non-input channel audio
(what is already on tape) goes through the DAC.
2 "dAC" - ALL audio goes through the DACs. The DAC is the Digital to Audio
Converter and is the process where the digital data gets returned to audio. In
normal circumstances you only need to hear the audio at the input stage and the
ADAT will always power up this way. However, it may be critical for you to hear
audio results AFTER the A to D (analog to digital) conversion process which is
why the DAC option is provided.
This is not quite the same as "monitoring off the record head". There are things that
could occur that you may find disturbing. For instance, during punch in/out, you will
hear very obvious clicks. (However, these clicks will not be on tape, it is purely a
byproduct of this type of monitoring.) If you are concerned to make sure things are
"going down on tape" the way you want, nothing beats listening back once you have
done a take.
Also, here's a section of the BRC manual:
4.7B Bouncing tracks
The BRC makes it possible to copy tracks between ADATs without
leaving the digital domain. The BRC assumes you have connected
the digital bus correctly between all ADATs in the system (see section
If DIGITAL I/O is pressed again when the digital input display reads
"ADAT", you may select which track(s) will be routed to the digital
bus, and thereby sent to any tracks that are in record when DIGITAL
I/O is enabled. This allows for digital track copying and backups.
To digitally bounce tracks:
1. Press the EDIT button (the EDIT button LED will go on to indicate
you are in Edit mode);
2. Press the DIGITAL I/O button;
The display will read:
3. Press the DIGITAL I/O button again while the digital input display
The display will show the following:
Select source with
All the record and input track LEDs will turn off, as they no longer
reflect the record/monitor status. The TRACK INPUT LEDs are now
used to reflect the current source tracks.
4. Use the TRACK SELECT buttons to choose the source tracks (that
is, the tracks to be assigned to the digital bus);
• If you select a track to be a source that was previously put into
record-enable, it will automatically be taken out of record-enable.
Once a track has been selected as a source, it cannot be put into
record-enable while the DIGITAL I/O button is turned on.
• To select a single source track, press the desired TRACK SELECT
button. The track will now be enabled and its green Input LED will
be lit. Pressing the same button again will disable that track and
turn off the LED. You may now select a different track.
• If multiple track sources are desired, they must come from the
same tape machine. This is because when one track is chosen, the
entire machine becomes the transmitter, while all other connected
ADATs become receivers. Only one ADAT can transmit over the
digital bus at any given time. When a track is selected as a source,
any tracks from other machines that were previously enabled as
sources will be disabled automatically.
• If no source tracks are selected, the ADATs’ digital outputs will
function as digital through connections. This allows for another
digital audio device, such as the Alesis QuadraSynth, to be
connected to the first ADAT’s digital input and thus recorded onto
any ADAT connected to the digital bus.
5. Press the EDIT button to exit edit mode;
6. Press the DIGITAL I/O button to enable the digital bus (the
DIGITAL I/O LED will go on to indicate it is enabled);
7. Use the TRACK SELECT buttons to record-enable the destination
tracks (see section 3.2B);
8. Initiate recording (see section 3.3C).
• The source tracks will be recorded onto the destination tracks in
If source tracks 1, 2, and 3 are selected and tracks 12, 17, and 24 are
record enabled, then track 1 will be copied to track 12, track 2 to track
17, and track 3 to track 24.
• If more destination tracks are selected than source tracks, the
source tracks will repeat (cycle).
If tracks 25 and 29 were added to the destination tracks of the previous
example, then track 1 would be copied to track 25, as well as to track
12, and track 2 would be copied to track 29, as well as track 17.
This type of scheme also allows for copying a single track to multiple
• A digital source track cannot be selected as a digital destination
track (i.e. digital source tracks will not be allowed to be record
enabled when DIGITAL I/O is enabled).
• When copying digital tracks, any track delays and machine offsets
will be in effect.