User guide

Pro Tools|HD User Guide20
To connect Pro Tools|24 MIX audio interfaces:
1 Connect the “MIX card” end of the peripheral
cable that came with your Pro Tools|24 MIX au-
dio interface (60-pin side) to the Legacy Port on
the primary Pro Tools|HD audio interface
(192 I/O, 192 Digital I/O, or 96 I/O only). Con-
nect the other end to the Computer Port on the
Pro Tools|24 MIX audio interface.
2 Do one of the following:
• Connect any additional Pro Tools|24 MIX
audio interfaces in the same manner, to
Pro Tools|HD audio interfaces connected
directly to Pro Tools|HD cards.
– or –
• If you are using a Y cable (Legacy 16-chan-
nel peripheral cable adapter), connect this
to the Legacy port first, then connect the
audio interface peripheral cables to Port A
and Port B of the Y cable.
3 To properly clock the Pro Tools|24 MIX audio
interface, connect the Ext. Clock output port on
the Pro Tools|HD audio interface to the Slave
Clock In on the Pro Tools|24 MIX audio inter-
face. The Pro Tools|24 MIX audio interface will
switch to Slave mode once the proper clock is
outputting from the Pro Tools|HD audio inter-
face. Always use the Ext. Clock Out port of the
same audio interface to which the Pro Tools|24
MIX audio interface is attached.
If you are using the Y cable to connect multiple
Pro Tools|24 MIX audio interfaces, you must
also connect the Slave Clock Out of the first Leg-
acy interface to the Slave Clock In of the second
Legacy interface with the provided BNC cable.
You cannot clock more than two Pro Tools|24
MIX audio interfaces from a single Pro Tools|HD
audio interface. If you have a third Pro Tools|24
MIX audio interface, supply its 256x clock from
the Pro Tools|HD audio interface to which its
60-pin cable is attached.
Optional 16-channel peripheral cable adapter
“A” to first
Legacy I/O
“B” to second
Legacy I/O
To Legacy Port on
Pro Tools|HD audio interface
To ensure the proper functioning of
Pro Tools|24 MIX audio interfaces (such as
an 888|24 I/O or 882|20 I/O), launch
Pro Tools and initialize the Pro Tools|24
MIX audio interfaces in the Hardware Setup
dialog before turning them on (See “Config-
uring Legacy I/Os” on page 59). Then quit
Pro Tools and shut down your computer.
When relaunching your Pro Tools system,
turn on your Pro Tools|24 MIX audio inter-
faces first and allow them to complete pow-
ering on before turning on your
Pro Tools|HD audio interfaces. Then start
up your computer.
Before you turn on and configure your
Pro Tools|24 MIX audio interfaces, turn
down the volume of output devices. Very
loud digital noise may be emitted before any
connected Pro Tools|24 MIX audio inter-
faces are initialized.