Manual

1.8
Operation Manual
© 2016 Prism Media Products Ltd
Revision 1.01Prism Sound Callia
· Connect Callia's analogue outputs to a monitoring amplifier or active speakers, using the XLR or
RCA analogue output connectors. Make sure that the volume of the amplifier or speakers is turned
down until we're sure everything is OK. On the other hand, you could just plug in some
headphones - make sure the headphone volume control is backed off to start with.
· Connect Callia to the mains using the power lead provided. Some front panel LEDs should light up.
If you've connected a computer, Callia should show up as a WDM device (and some ASIO ports)
on a Windows PC, or a Core Audio device on a Mac.
Now you should be able to play some audio:
· Press the standby/source button at the right hand end of Callia's front panel until the desired source
is selected, with the 'AUTO' LED off.
· Start playback on the S/PDIF source, or by running a player application on PC or Mac.
· By advancing the line volume control (having turned up the volume control on the amplifier or active
speakers, if you turned it down earlier) you should have audio. If you're using headphones, you
may have to turn up the headphone volume control.
Once everything is working, register your Callia at http://www.prismsound.com/audiophileregister.
You can familiarise yourself with the front panel controls by looking at the Front panel section. You
might want to customise some aspects of Callia's operation by referring to the DIP switch functions
section.
2.3 System requirements
For S/PDIF operation, Callia will work with any optical (TOSLINK) or RCA/phono PCM source at
sample rates up to 192kHz.
For USB operation, Callia will work with any modern host PC or Mac with a suitable operating system
and a USB 2.0 or 3.0 port, and with Linux-based PC, player, streamer and server devices.
Macs must be Intel platform and must be running OS X 10.5 Leopard or later; PCs must be running
Windows Vista, 7 , 8, 10 or later (32-bit or 64-bit); Linux devices must incorporate the ALSA UAC2
driver. This is not to say that the computing power of the host is unimportant, but it is more a
requirement of the audio applications than of Callia. If you need to play out audio files at high sample
rates or with a lot of processing or plug-ins, you will need a host computer with a fast processor and
bus, plenty of RAM, and probably a fast hard disk too. On the other hand, play out at lower sample
rates can be accomplished with even a modest computer. A good way to gauge this is to be guided
by the system requirements of the audio software which you are intending to use. For more
information about this, see the Stability and latency section.