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Prism Sound Orpheus
The
Input Setup tab
of the
TOSLINK connector for S/PDIF input, and also an indicator to show that the S/PDIF input is
UNLocked (i.e. no S/PDIF carrier is recognized). The UNLock indicator is also shown beneath the
digital meter on the unit's front panel (providing that the unit's meters are in Input mode).
The TOSLINK connector can also accept 8-channel digital input in ADAT format (at 44.1kHz or 48kHz
sample rates) or 4-channel input 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 configure a
section.
5.1.2.1
Sample-rate converter
A two-channel sample-rate converter (SRC) can be activated in the S/PDIF input if desired. This
provides very high-quality conversion of any incoming digital audio signal to Orpheus' current sample
rate. The SRC is selected in the
SRC can be configured in the S/PDIF input, or in the S/PDIF output, but not in both simultaneously.
Note that presence of an SRC in the S/PDIF input is shown by an indicator beneath the digital meter
on the unit's front panel (providing that the unit's meters are in Input mode).
5.1.2.2
DI synchronization
Note that it is necessary to ensure that the sample clock of any digital audio input is synchronous with
Orpheus' sample clock (unless the
either by synchronizing Orpheus to the source (by using DI or ADAT sync source), or by
synchronizing the source to Orpheus' S/PDIF, ADAT or Wordclock output. Orpheus also has a
Wordclock sync input for synchronization to Wordclock-equipped sources or house syncs.
The
Input Settings tab
S/PDIF input is ASYNChronous (i.e. there is an S/PDIF signal present but it is not synchronous with
Orpheus' sample clock.
For more information about synchronization settings, see the
section describing the
5.1.3
Analogue outputs
Orpheus provides eight analogue output channels on TRS jacks, with dual switchable output level to
allow connection to professional or consumer line-level equipment. Connection to unbalanced
equipment is automatically accommodated by a level-compensation 'bootstrapping' circuit.
In normal operation, the eight analogue 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 any desired outputs, primarily for use as a monitor
volume control - this is described in the
Setting of analogue output levels, as well as activation of output mixers and assignment of the level
© 2008 Prism Media Products Ltd
Orpheus Control Panel applet
sample-rate converter
Unit Settings tab
SRC
is active in the digital input path). This can be achieved
of the
Orpheus Control Panel applet
Unit Settings tab
of the Orpheus Control Panel applet.
Output mixers
Assignable level control
Operation Manual
contains the control for selecting the RCA or
Unit Settings tab
of the Orpheus Control Panel
in the S/PDIF input, as described in the following
of the
Orpheus Control Panel
contains an indicator to show that the
Synchronization
section below.
section below.
Revision 1.05
applet. Note that the
section and also the
1.24
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