Synchronize To Workstation; Synchronize To Ada-8 - Prism Sound ADA-8XR Module Reference

Prism Sound ADA-8XR Multi-channel A/D D/A Converter
If it is not already, set the PC Driver synchronization source to 'External'. You can do this by
checking the Clk Master box next to any ADA-8 FireWire I/O Module in the list.
Next select an ADA-8 FireWire I/O Module and press the 'Change Synchronization Mode'
button. Select the CSP (MSU Synch Output) option in the dialogue box that appears and
press 'OK'.
Repeat for all of the ADA-8 FireWire I/O Modules in your system, and then press 'Apply'. Your
system should now be correctly synchronized.
Note that some FireWire interfaces do not have the highest accuracy clocks and so, when
using this method of synchronization, the sampling clock is subject to a frequency accuracy of
±200ppm ( ±0.02%). In the vast majority of cases this will suffice, but if you require greater
frequency accuracy than this you should synchronize to one of your ADA-8 units as described
in Section 9.8.3.3.
9.8.3.2

Synchronize to Workstation

You can use this setting if you do not need to synchronize your ADA-8(s) to an external clock
source or digital input. In this mode all audio devices on the FireWire bus are synchronized to
the workstation by means of a FireWire Synchronous Timestamp (SYT).
To setup your system to synchronize to the workstation open the Driver Control Panel, and
select the Synchronization tab.
If it is not already, set the PC Driver synchronization source to 'Internal'. You can do this by
checking the Clk Master box next to PC Driver in the device list.
Next select an ADA-8 device and press the 'Change Synchronization Mode' button. Select the
SYT (PCR Compound Input) option in the dialogue box that appears and press 'OK'.
Repeat for all of the ADA-8 FireWire I/O Modules in your system, and then press 'Apply'. Your
system should now be correctly synchronized.
Note that some workstations do not have the highest accuracy clocks and so, when using this
method of synchronization, the sampling clock is subject to a frequency accuracy of ±200ppm
( ±0.02%). In the vast majority of cases this will suffice, but if you require greater frequency
accuracy than this you should synchronize to one of your ADA-8 units as described in Section
9.8.3.3.
9.8.3.3

Synchronize to ADA-8

This method of synchronization allows the use of any of the usual ADA-8 Clock Sources,
including Local Clock, AES Reference, Word Clock or a Digital Input. The trade off is that it is
slightly more complicated to manage in systems with multiple units or multiple FireWire I/O
modules.
Firstly you must choose one of your FireWire I/O Modules to be the Clock Master of the
system. If you wish to use an external clock source, this should be a FireWire I/O Module that
is located in the ADA-8 unit that is to be connected to the external clock source. Otherwise, if
you are using the ADA-8 Local Clock, you may choose any FireWire I/O Module as the Clock
Master. In the case that there is only one FireWire I/O Module in the system then this module
should be nominated as the Clock Master.
To nominate the Clock Master FireWire I/O Module open the Driver Control Panel, and select
the Synchronization tab.
© Prism Media Products Limited, 2001-2005
Module Reference - Revision 1.01
Page 3.59