Owner`s manual

14
computer. Thus two separate digital stereo sources will be available (for recording,
routing, etc.) within the computer’s audio system (4 channels). Since certain
recording applications simply call for stereo sources, the primary input switch
(fig. 2.3) allows you to select which of the input connectors is chosen as the
primary of the two stereo inputs.
2.1.4 Synchronization
The synchronization source and rate of the INT203 can be freely chosen among:
Internal an internal clock is generated within the INT203. Typically chosen
when the INT203 is used as a digital output for connecting to external
equipment. With the proper (advanced) player software the sampling rate
of the INT203 is switched automatically depending on the track played.
This is a key issue in order to achieve bit transparency (see also section
2.3.4).
AES/EBU XLR synchronization is achieved by an external source connected
via the XLR input. Typically chosen when a digital audio source is
connected (via XLR) in order to transfer audio to the computer (e.g. for
recording).
S/PDIF RCA synchronization is achieved by an external source connected via
the RCA input. Typically chosen when a digital audio source is connected
(via RCA) in order to transfer audio to the computer (e.g. for recording).
In all cases the INT203 will function as the synchronization master for the
computer. The INT203’s intrinsic jitter is very low. When synchronizing to
external sources the INT203 will automatically detect the sampling rate and
sync-lock to it. Synchronization settings are controlled via the Weiss Firewire
IO window. On a Mac system the sampling rate set in AudioMidi sets the one
in the Weiss Firewire IO window and vice versa.
Since certain audio applications on your computer (e.g. recording tools) rely
on the sync rate setting within the Weiss Firewire IO control panel, make
sure the synchronization settings are set to the correct rate before recording
or when playing back audio.
2.1.5 Power Supply
The power can be either supplied from the Firewire bus or from the external
power supply supplied with the INT203.
Firewire bus power may or may not be available with the particular computer
used. Refer to the computer manual to find out. If the Firewire connector at the
computer is a 4 pin type (fig. 2.1) then bus power is not available by definition.
With other types of connectors (6 pin or 9 pin) bus power may be available.