- ADAT Interface Slave Clock out to first Audio Interface Slave Clock in. (Daisy chain the Slave Clock to other Audio Interfaces.)- Last 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) Pro Tools Interface5) Expansion Chassis (where applicable)6) Computer