- VSD Slave Clock out to first Audio Interface Slave Clock in. If there are multiple Audio Interfaces, then daisy chain the Slave Clock out to Slave Clock in of the other Interfaces.- Audio Interface Slave Clock out to ADAT InterfaceSlave Clock in.- SSD MIDI out to MIDI Interface MIDI In or SSD Mac Port to Serial Port on CPU.Note: PT 3.1 or greater is required for VSD sync in the above configuration.Power up order:1) Hard Drives2) ADAT. Verify that the ADAT is in Internal Sync3) ADAT Interface4) VSD and SSD5) Pro Tools Interface6) Expansion Chassis (where applicable)7) Computer