
dCS Delius
User Manual
Manual for Software Issue 2.3x
dCS
Ltd
September 2004
Manual filename: Delius Manual v2.3x.doc
Page 25
email: [email protected]
English version
web-site: www.dcsltd.co.uk
Dual AES
Dual AES
Dual AES
Dual AES
– Dual AES Mode
The Dual AES interface was developed by
dCS
to allow 88.2 or 96kS/s data
streams to be recorded on equipment designed for 44.1 or 48kS/s operation. It
allows a stereo pair of 24/96 data to be recorded on a 4-track digital recorder.
Dual AES mode has become a de-facto standard, appearing on an ever
increasing array of products. Since then, we have developed the Dual AES
interface further to operate at up to 192kS/s, doubling the available audio
bandwidth a second time.
All
dCS
non-optical single-wire interfaces are capable of 24/96 operation, but
some of our audiophile customers have told us there are extra sonic
improvements to be gained from using Dual AES for 24/96 instead. The reason
for this is certainly not obvious – the digits appear to be the same, it is not
related to jitter.
For 24/192 operation there is no choice but Dual AES. Even our high-speed
single wire interfaces are not currently fast enough.
There are certain requirements for successful Dual AES operation. Obviously,
the source must generate a true Dual AES data stream, not two single AES
outputs. The two cables should be similar in length (less than 3m difference).
The two cables must be connected the right way around or the channels will be
swapped.
Changing inputs between single wire and Dual AES may cause the DAC to
default to single AES mode. To avoid this problem, the
Dual AES
page offers
the following four options:
Off
Disables
Dual AES
mode for when no Dual AES capable
sources are in use.
On
Allows
Dual AES
mode to be manually selected from the
front panel
Input
button (see page
) or the Remote
Control, (see page
Auto
Delius
detects single wire or
Dual AES
mode from the
message flags in the data stream and sets the mode
accordingly. If a Dual AES source is detected but only
one wire is connected, it will lock to the source as single
AES but flash either the
AES1
or
AES2
indicator to warn
you that one cable is missing.
Lock
If both
AES 1
and
AES 2
are active, selecting either AES
input in this mode forces the unit into
Dual AES
mode. If
only one wire is connected, the unit warns you of this by
flashing the indicator for the missing wire.
Lock
mode is
particularly useful when using an Upsampler –
upsampling everything to 176.4 or 192kS/s Dual AES. In
this case, leave
Delius
set to
Lock
mode and select
inputs on the Upsampler.
IMPORTANT!
Note that not all Dual AES capable equipment sets the message flags
correctly. If this is the case, do not use
Auto
mode. You can use it with
confidence on
dCS
equipment.
do this:
To select the
Dual AES
mode you require, open the Function Menu and step
through until the display shows
Dual AES
.
do this:
Press the
Select
button repeatedly and the display will cycle through the
options. When you reach the one you want, wait for the menu to time out.