1.31
Operation Manual
© 2013 Prism Media Products Ltd
Revision 1.00Prism Sound Lyra
· Line output TRS jacks 1-4 (1-2 only on Lyra 1): switchable +4dBu/-10dBV level, can operate in
balanced or unbalanced mode. See Analogue outputs.
· Line input TRS jacks 1-2: switchable +4dBu/-10dBV level, can operate in balanced or unbalanced
mode. See Analogue inputs.
· Mic input XLRS 1-2 (channel 2 only, on Lyra 1): for microphones, with 10dB to 65dB finely-
adjustable gain, switchable -20dB pad and switchable phantom power. See Analogue inputs.
5.4.1 Fuses and ratings
TO PREVENT SHOCK HAZARD, THE LYRA HARDWARE SHOULD ONLY BE
OPENED BY QUALIFIED PERSONNEL. REMOVE THE POWER LEAD FROM THE
UNIT BEFORE REMOVING THE TOP COVER.
Fuse locations and ratings are as follows:
Note that no fuses or any other user-serviceable parts or options are located inside the Lyra
unit.
5.5 Stand-alone operation
It is possible to operate Lyra without a connection to a host computer. This is done by setting up the
unit as required using the Lyra Control Panel app whilst it is connected to a host computer via its
USB interface, then placing the unit in standby by pressing the standby button, before disconnecting
the unit from the host and power source. When the unit is re-powered, and detects that no USB
connection is active, it reloads the settings which were previously stored.
Since all of the outputs have optional mixers within the Lyra hardware whose inputs include all of
Lyra's input connectors, it is possible, for example, to connect the digital input pair to one or more
analogue output pairs, and to connect the analogue input pairs to the digital output pair. The
synchronization source and sample rate can be set in the usual way. Thus stand-alone mode can be
used to configure a stand-alone D/A converter and A/D converter, with static mixing if required.
NOTE: If, during stand-alone operation, Lyra is set to use an external synchronization source,
i.e. DI, Wordclock or ADAT (only available in ADAT modes), then the sample rate is
automatically changed to follow the sample rate of the external synchronization source. If the
designated synchronization source is not connected, the sample rate reverts to local sync at
the selected sample rate.
5.6 Rack mounting
Lyra is supplied configured for table-top operation, with rubber feet attached and no rack-mount ears
fitted.
To convert for rack-mounting, rack ears can be ordered as an option: First fit the rack-mount ears by
removing the front four screws from each side of the unit, using the hex key provided; then replace
the same screws to retain the rack ears. If necessary, the rubber feet can be removed by
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