Phonic 16x16 Universal Expansion Card Manual Del Usuario página 19

Please find a detailed description on the Apple website: http://www.apple.
com/ca/pro/techniques/aggregateaudio/
For Windows, simply ensure that you've installed the device driver once for
each instance of the Digital Mixer that will be used on the computer. After doing
so, you should be able to connect both units in a daisy-chain and have them
recognized by the Phonic Control Panel.
After connecting multiple units to your computer, you need to create proper
synchronization setup. One unit has to be a master device, and everything else
must be a slave to this.
 Set the "Clock Source" to e.g. Digital Mixer (make sure it is not the PC or
Mac)
 Setup the other Digital Mixer to sync to "SYT"
Please note that daisy-chaining is not possible through USB, as it is not a real
bus, rather a point-to-point connection.
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16x16 Universal Expansion Card