MOTU 8pre, User Manual

Page: 24 / 68

M O T U A U D I O S E T U P
24
’GENERAL’ TAB SETTINGS
Sample Rate
Choose the desired Sample Rate for recording and
playback. The 8pre can operate at 44.1 (the
standard rate for compact disc audio), 48, 88.2 or
96 kHz. Make absolutely sure that all of the devices
connected digitally to the 8pre match the 8pre’s
sample rate. Also make sure that your Digital
Timepiece, MIDI Timepiece AV or other digital
audio synchronizer matches it as well.
☛
Mismatched sample rates cause distortion and
crackling. If you hear this sort of thing, check the
sample rate settings in your hardware and here in
MOTU Audio Setup.
Clock Source
The Clock Source determines the digital audio
clock that the 8pre will use as its time base. The
following sections briefly discuss each clock source
setting.
Internal
Use the Internal setting when you want the 8pre to
operate under its own digital audio clock. For
example, you may be in a situation where all you
are doing is playing tracks off hard disk in your
digital audio software on the computer. In a
situation like this, you most often don’t need to
reference an external clock of any kind.
ADAT optical
The ADAT optical clock source setting refers to the
clock provided by the 8pre’s optical input, when it
is connected to an ADAT optical device. This
setting can be used to slave the 8pre directly to the
optical input connection. In this scenario, the
ADAT Optical clock source setting lets you slave the
8pre to the other device via its digital connection to
the 8pre.
☛
The 8pre has two banks of optical connectors:
a top row (for 8-channel operation at 44.1 or 48
kHz) and a bottom row (for channels 5-8 at 88.2 or
Figure 5-1: MOTU Audio Setup gives you access to all of the settings in the 8pre hardware.