Specifications

1.30

Operation Manual

Revision 1.05Prism Sound Orpheus

inputs 3&4. The mic selection indicators change from green to orange to indicate that phantom

power is switched on. See Analogue inputs.

· Master indicator: this is lit when the device is sample clock master (from the FireWire bus point of

view). If a device is configured to be clock master, but is itself slaved to a wordclock or DI

reference which is absent or at a different frequency from the selected sample rate, the master

indicator flashes. For more information see the Synchronization section.

· Meter input/output indicator: shows whether the ten bar-graph meters are assigned to the analogue

and S/PDIF inputs, or to the analogue and S/PDIF outputs. This is selected in the Orpheus Control

Panel applet. See the Metering system section for more details.

· Overkiller indicators: indicate that the Overkiller progressive limiter is operating in that channel.

Note that the indication is dynamic, and shows when the Overkiller is actually limiting, and not

simply that it is enabled. Note that the Overkiller indicators are only active when the meters are in

input mode.

· DI unlock indicator: indicates that the S/PDIF input is unlocked, i.e. no S/PDIF carrier is recognised.

Only active when the meters are in input mode.

· SRC indicator: shows that the SRC (sample-rate converter) is configured in the S/PDIF input (if lit

when the meters are in input mode) or is configured in the S/PDIF output (if lit when the meters are

in output mode.

5.4 Rear panel

Orpheus' rear panel contains all Orpheus' connections, except for the instrument inputs and

headphone outputs, which are on the front panel.

From left to right (viewed from rear):

· 6A IEC inlet (regional power cord supplied): adjacent is the mains fuse holder.

· Two FireWire 400 (IEEE1394A) connectors (4-pin and 6-pin FireWire cables supplied). These

have identical function; either can be used to connect to the host computer, the other can be used

to daisy-chain additional Orpheus units if required. See Cascading multiple units.

· MIDI in and out/thru DIN sockets.

· Wordclock input and output BNC sockets: the wordclock output can supply base-clock or 256x

clock if required. See the Synchronization section.

· S/PDIF input and output RCA sockets: these can also be operated as AES3 interfaces (RCA-XLR

and XLR-RCA adapter cables supplied). See Digital inputs and Digital outputs.

· TOSLINK input and output: can be used for S/PDIF (up to 192kHz sample rate) or ADAT

(44.1kHz/48kHz or 88.2kHz/96kHz in SMUX mode). See Digital inputs and Digital outputs.

· Line output TRS jacks 1-8: switchable +4dBu/-10dBV level, can operate in balanced or unbalanced

mode. See Analogue outputs.

· Line input TRS jacks 5-8: switchable +4dBu/-10dBV level, can operate in balanced or unbalanced

mode. See Analogue inputs.