Installation guide

TDM Installation Guide26
Using the 888/24 I/O
Interface as Standalone
Audio Converter
The 888/24 I/O can be used apart from Pro Tools
as a standalone 8-channel, 24-bit, analog-to-dig-
ital or digital-to-analog converter.
Before you use the 888/24 I/O in standalone
mode:
1 Turn off the 888/24 I/O.
2 Do not turn on your computer while the
888/24 I/O is in standalone mode. If you do, the
888/24 I/O will stop functioning in standalone
mode.
To use the 888/24 I/O as a standalone A/D
converter:
1 Turn off any digital devices that may send a
word clock signal to the 888/24 I/O channel 1–2
digital input ports.
2 Turn on the 888/24 I/O. The 888/24 I/O
searches briefly for a word clock signal on chan-
nels 1–2 of its digital input ports.
3 If the 888/24 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 1–8 and AES/EBU outputs 1–8.
To use the 888/24 I/O as a standalone D/A
converter:
1 Make sure that a digital device providing a
word clock signal is connected to AES/EBU in-
puts 1–2 of the 888/24 I/O and turned on.
2 Turn on the 888/24 I/O. The 888/24 I/O will
search for a valid word clock or a word clock sig-
nal on channels 1–2 of its digital input ports.
3 When a valid word clock lock is recognized,
the 888/24 I/O will enter Digital mode and
function as a standalone D/A converter using
AES/EBU inputs 1–8 and analog outputs 1–8.
The 888/24 I/O D/A sample rate is determined
by the sample rate it detects on channels 1–2 of
its AES/EBU inputs.
To return the 888/24 I/O to Pro Tools-based
operation:
■ Turn on your computer.
– or –
■ If your computer is on, launch Pro Tools.
The default sample rate of the 888/24 I/O
in standalone A/D mode is 44.1 kHz.To
change this default setting to 48 kHz, you
must open the 888/24 I/O and manually re-
set it by moving an internal jumper switch.
Instructions for doing this are provided in
the 888/24 I/O Installation Guide.
The 888/24 I/O defaults to listening to a
digital word clock signal on channels 1–2 of
its AES/EBU digital input ports. To use a
S/PDIF device as your source of word clock,
you must reset this default by opening the
888/24 I/O and moving an internal jumper
switch. Instructions for doing this are pro-
vided in the 888/24 I/O Installation Guide.
That guide also provides instructions for
changing other standalone mode default pa-
rameters such as sample rate and DAC
muting.
TDM_Install.book Page 26 Saturday, January 13, 2001 9:35 PM