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Prism Sound Orpheus
control are all managed in the
5.1.4
Digital outputs
RCA and TOSLINK connectors output two-channel digital audio in the S/PDIF format at any standard
sample rate between 44.1kHz and 192kHz. The RCA output can also output digital audio in the AES3
(AES/EBU) format using the RCA-XLR adapter supplied. To do this, select 'AES3' instead of 'S/PDIF'
in the DO1/2 strip of the
carrier voltage to be increased to the AES3 level, and the Channel Status to adopt the professional
AES3 format instead of the consumer format of S/PDIF.
The TOSLINK connector can alternatively output 8-channel digital audio in ADAT format (at 44.1kHz
or 48kHz sample rates) or 4-channel audio in ADAT S/MUX format (at 88.2kHz or 96kHz sample
rates).
Note that ADAT input and output is only possible when operating Orpheus in one of its specific
ADAT-capable modes. This is to reduce overhead on the host PC or Mac when ADAT input and
output is not required. For more information see the
applet.
It is possible to perform
to 16-bits) as described in the following sections.
In normal operation, the S/PDIF digital outputs are fed directly with individual signals from the host PC
or Mac; however, it is possible to feed the outputs from local digital mixers within the Orpheus
hardware if desired - this is described in the
It is also possible to assign a level control to the S/PDIF outputs, primarily for use as a monitor
volume control - this is described in the
Activation of output mixers and assignment of the level control are all managed in the Outputs Setup
tab of the Orpheus Control Panel applet.
5.1.4.1
Sample-rate converter
A two-channel sample-rate converter (SRC) can be activated in the S/PDIF output if desired. This
provides very high-quality conversion of the output signal from Orpheus' current sample rate to any
standard rate between 44.1kHz and 192kHz. The SRC is selected in the
Orpheus Control Panel
S/PDIF output, but not in both simultaneously.
When using an SRC in the S/PDIF output, it is necessary to select a synchronization source and
sample rate for the converted output. The sync source can be local, DI (the S/PDIF input) or the
Wordclock input. These settings are made in the
applet.
Note that presence of an SRC in the S/PDIF output is shown by an indicator beneath the digital meter
on the unit's front panel (providing that the unit's meters are in Output mode).
5.1.4.2
Word-length
It is possible to control the word-length of the S/PDIF output using the word-length control, uppermost
in the DO1/2 strip in the Output Setup tab of the Orpheus Control Panel applet. The control operates
as follows:
© 2008 Prism Media Products Ltd
Outputs Setup tab
Outputs Setup tab
of the
sample-rate conversion
Output mixers
Assignable level control
applet. Note that the SRC can be configured in the S/PDIF input, or in the
Operation Manual
of the
Orpheus Control Panel
Orpheus Control Panel
Unit Settings tab
of the Orpheus Control Panel
and
word-length reduction
section.
section below.
Output Setup tab
of the Orpheus Control Panel
Revision 1.05
applet.
applet. This causes the
(dithering or noise-shaping
Unit Settings tab
of the
1.25
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