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186 Chapter 17—Digital Audio I/O
D24—Owner’s Manual
Using Dual AES/EBU Mode
When using the higher sampling rates of 88.2 kHz and 96 kHz, the number of tracks is
reduced from eight to four and the available tracks are 1, 3, 5, and 7. Project, track, and
part editing functions are not available in this mode. For digital I/O, the D24 uses what’s
known as Dual AES/EBU mode, in which the wordclock frequency is exactly half that
of the sampling rate. With a sampling rate of 96 kHz, for example, the wordclock fre-
quency is 48 kHz. Digital I/O in Dual AES/EBU mode is only available with AES/EBU
mini YGDAI cards.
In Dual AES/EBU mode, each AES/EBU format digital I/O signal is split in two, requir-
ing two transmission channels. Normally, two AES/EBU format signals, left and right,
for example, are transmitted by a single balanced connection. In Dual AS/EBU mode,
however, only one AES/EBU format signal can be transmitted per connection.
The following table shows which tracks and AES/EBU inputs and outputs are used in
Dual AES/EBU mode.
The adjacent illustration shows how
external equipment, in this case a
2-channel AD/DA converter that sup-
ports Dual AES/EBU, can be con-
nected to the D24 for Dual AES/EBU
operation. A custom breakout cable is
used to connect the D24 and con-
verter. Each XLR connection handles a
single AES/EBU signal, so 2-track
recording and playback is possible.
The sampling rate is 96 kHz and the
wordclock frequency is 48 kHz.
Shown below is an AES/EBU breakout
cable similar to the one used in this
system.
D24 Track AES/EBU Inputs AES/EBU Outputs
1 1/2 1/2
3 3/4 3/4
5 5/6 5/6
7 7/8 7/8
Sampling rate: 96 kHz
Dual AES/EBU mode I/O
00000000
YAMAHA D24
OVER
READY
0
2
6
1012
1420
1830
20
42
2660
–dB
OVER
ABS H
LOCK
TIME DISPLAY
CAPTUREABS/REL
REMAIN
VARI
SPEED
UTILITY
SETUP
PROJECT
SELECT
LOC MEM
RECALL
LOC MEM
STORE
LOCATEENTERCANCEL
0/-
1
4
7
8
R
7654321
RECORD
READY
SOLO/
SELECT
MONITOR SELECT
PEAK
HOLD
AUTO
INPUT
ALL
INPUT
FORMATCHASE
L
2
5
8
3
6
9
UNDO/
REDO
EDIT
JOG ON
JOG/DATASHUTTLE/
CURSOR
PROJECT SEARCH
RTN TO
ZERO
REW FF
STOP PLAY REC
ROLL
BACK
LAST REC
SET
DIGITAL MULTITRACK RECORDER
REPEAT
REHE
PHONES
LEVEL
010
ON
POWER
OFF
PHONES
BA
B
A
AUTO
PUNCH
IN
OUT
INT
24
48K
MASTER
WC
BIT
FS
TC
MSF
READY
0
2
6
12
20
30
42
60
–dB
V. TR A C K
SELECT
mYGDAI: AES/EBU
(SLOT 1)
AES/EBU OutAES/EBU In
D24 (wc slave: SLOT 1 DUAL)
AD/DA converter (wc master)
AES/EBU breakout cable
25-pin D-sub connector
Female XLR x4
Male XLR x4
TRK 1 (outputs 1/2)
TRK 3 (outputs 3/4)
TRK 5 (outputs 5/6)
TRK 7 (outputs 7/8)
TRK 1 (inputs 1/2)
TRK 3 (inputs 3/4)
TRK 5 (inputs 5/6)
TRK 7 (inputs 7/8)