Installation guide

Chapter 4: Connecting Your Studio 31
Figure 2 diagram shows a setup without a mixer,
where effects and monitoring gear are con-
nected directly to the 882/20 I/O.
Using the 882/20 I/O
Interface as Standalone
Audio Converter
The 882/20 I/O can be used apart from Pro Tools
as a standalone 2-channel, 20-bit, analog-to-dig-
ital or digital-to-analog converter.
Before you use the 882/20 I/O in standalone
mode:
1 Turn off the 882/20 I/O.
2 Do not turn on your computer while the
882/20 I/O is in standalone mode. If you do, the
882/20 I/O will stop functioning in standalone
mode.
To use the 882/20 I/O as a standalone A/D
converter:
1 Turn off any digital devices that may send a
word clock signal to the 882/20 I/O S/PDIF digi-
tal input.
2 Turn on the 882/20 I/O. The 882/20 I/O
searches briefly for a word clock signal on chan-
nels 1–2 of its digital input ports.
3 If the 882/20 I/O does not detect word clock,
it functions as a standalone A/D converter using
its internal clock. In this mode you will use an-
alog inputs 1–2 and the S/PDIF output.
To use the 882/20 I/O as a standalone D/A
converter:
1 Make sure that a digital device providing a
word clock signal is connected to the S/PDIF in-
put of the 882/20 I/O and that the device is
powered on.
2 Turn on the 882/20 I/O. The 882/20 I/O will
search for a valid word clock on its S/PDIF input.
3 When a valid word clock lock is recognized,
the 882/20 I/O will enter Digital mode and
function as a standalone D/A converter using
the S/PDIF input and analog outputs 1–2.
The 882/20 I/O sample rate is determined by the
sample rate that it detects on its S/PDIF input.
Figure 2. Typical studio configuration without a mixer
The 882/20 I/O always operates at
–10 dBV when in standalone mode.
Power Amp
and Speakers
S/PDIF Digital Input/Output
To DAT Recorder
DAT Recorder
Analog
Audio
Outputs 1-2
Effects Devices
C
O
M
P
U
T
E
R
A
N
A
L
O
G
O
U
T
P
U
T
S
1
2345678
A
N
A
L
O
G
I
N
P
U
T
S
123456
78
Analog
Audio
Inputs 1-2
I
N
I
N
S
L
A
V
E
C
L
O
C
K
O
U
T
O
U
T
S
/P
D
IF
Analog
Audio
Inputs/Outputs
3-8
Mic Preamp,
Direct Box, Synth, etc.
In standalone mode, the 882/20 only oper-
ates at a 44.1 kHz sample rate. If you want
to convert analog signals into 48 kHz digi-
tal audio, you must launch Pro Tools (or
any other software which supports the
882/20 I/O) to change the default sample
rate.
TDM_Install.book Page 31 Saturday, January 13, 2001 9:35 PM