- VSD Slave Clock out to first Audio Interface Slave Clock in. (Daisy chain the Slave Clock to other Audio Interfaces.)- Audio Interface Slave Clock out to ADAT Interface Slave Clock in.The "4/8" button on the rear of the ADAT Interface should be in when using an 8ch Peripheral (882, 888, etc.)Power up order:1) Hard Drives2) ADAT (set ADAT to Internal Sync + )3) ADAT Interface4) VSD5) Pro Tools Interface6) ComputerNote: PT 3.1 is required for VSD sync in the above configuration.