MOTU 828x 28x30 Audio Interface with ThunderTechnology - Manual (Page 38)

M O T U A U D I O C O N S O L E
38
‘GENERAL’ TAB SETTINGS
Sample Rate
Choose the desired Sample Rate for recording and
playback. The 828x can operate at 44.1 (the
standard rate for compact disc audio), 48, 88.2, 96,
176.4 or 192KHz. If you are operating at a sample
rate between 44.1 and 96kHz, make absolutely sure
that all of the devices connected digitally to the
828x’s optical connectors match the 828x’s sample
rate. At the 4x sample rates (176.4 or 192kHz),
optical I/O is disabled.
☛
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 Console.
Operation at 4x sample rates (176.4 or 192kHz)
At the 4x sample rates (176.4 or 192kHz),
operation of the 828x is restricted, due to the
higher audio bandwidth demands, as follows:
■ All digital I/O is disabled (there is no ADAT
optical, TOSLink or S/PDIF input/output).
■ The 828x provides 8 channels of analog input
and 8 channels of analog output, simultaneously.
■
The stereo return bus, as described in “Return
Assign” on page 41, can only be assigned to one of
the four available analog output pairs.
■
The headphone output can only be assigned to
one of the four available analog output pairs.
■
The Main Outs can only be assigned to one of
the four available analog output pairs.
Master Clock Source
The Master Clock Source determines the digital
audio clock that the 828x will use as its time base.
For a complete explanation of synchronization
issues, see “Making sync connections” on page 30.
The following sections briefly discuss each clock
source setting.
Figure 5-1: MOTU Audio Console gives you access to all of the settings in the 828x hardware.