User Manual-Windows

MOTU PCI AUDIO CONSOLE
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inputs at a time. The factory default setting is
+4 dB. If an input signal sounds weak, try the
-10 dB setting.
Wor d O ut R a t e
The Word O ut Rate menu lets you either double or
halve the current PCI-424 system word clock rate.
If the current system word rate is a high sample rate
(88.2 or 96 kHz), then the word clock output can
either match it or operate at half the rate (44.1 or 48
kHz).
If the current system word rate is a low sample rate
(44.1 or 48 kHz), the word clock output can either
match it or operate at twice the rate (88.2 or
96 kHz).
HD192 interface options
The Interface options button opens a dialog that
provides several options for the HD192’s AES/EBU
section and front-panel the level meters.
Figure 6-9: The HD192 interface options.
The HD192 AES/EBU section has flexible clocking
options and separate sample rate converters on
both input and output. Below is a brief summary of
the possible settings for these features.
Steal inputs
Internally, the AES/EBU stereo section shares the
same bus as the analog section of the HD192. The
Steal Inputs menu lets you choose which pair of
analog inputs to replace with AES/EBU input. For
example, if you choose inputs 11-12 from this
menu, analog inputs 11 and 12 are temporarily
disabled and replaced by the AES/EBU inputs. In
your host audio software, inputs 11-12 now refer to
the AES/EBU input.
Rate Convert
Enable the Rate Convert option when you wish to
convert the sample rate of the incoming AES/EBU
digital audio signal to the sample rate at which the
HD192 system clock is running. For example, if the
HD192 system clock is running at 96 kHz, and the
AES/EBU input signal is at 44.1 kHz, enable Rate
Convert to transform the 44.1 kHz signal into a 96
kHz signal. Rate conversion is applied in real time
as the signal passes through the AES/EBU input’s
sample rate converter.
Mirror Analog
Choose the analog output pair you would like to
match for AES/EBU output. For example, if you
choose analog Outs 3-4 from the Mirror analog
menu, then the audio signal being sent out analog
outputs 3-4 will also be sent to the AES/EBU stereo
output. This would allow you, for example, to
monitor a stereo mix via analog outs 3-4 while at
the same time transferring the same stereo mix via
AES/EBU to a DAT deck or other AES/EBU device.
Figure 6-10: The choices in the Mirror Analog menu for the HD192’s
AES/EBU output.