Grimm Audio CC1, Руководство пользователя

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5. Pro Tools
Avid Pro Tools is by far the most common DAW, warranting a special section on
how to set up the CC1 in a PT rig. In our experience described method is the set-up
that leads to the best sound quality. Any deviation from this method might give you
stable sync, but will probably not be sonically optimal.
Pro Tools in music production, CC1 master
Pro Tools 192 interfaces feature a “Loop Sync” function where clock cables are con-
nected in a ring: every “Loop Sync in” is connected to the next unit’s “Loop Sync
out”, the last unit connects to the first. Like in any correct clock setup, one unit is
master and all others slave. The advantage of Loop Sync is any unit can be desig-
nated master and run on its internal clock. All others slave to that unit. The Loop
Sync input of the master unit is ignored and effectively an ordinary word clock daisy
chain results. Now if Pro Tools is to slave to word clock, the unit that receives the
word clock always becomes loop master, the others automatically slave to Loop
Sync. We can make use of this feature by fooling the system into believe that Loop
Sync is in use, while actually a star clock distribution is utilized. Star clock distribu-
tion has the advantage that it is more fail safe than daisy chaining and jitter gain of
subsequent PLL’s is avoided.
• Connect an output of CC1’s group 2 to the “External Word Clock” input of the first
unit in the chain (if present the Sync I/O, otherwise the first 192).
• Connect the outputs of CC1’s group 1 to the Loop Sync input of each “192” inter-
face. Every 192 gets its own connection to the CC1 (star distribution). Make sure
group 1 is set to ‘x1’.
In case you need to run higher sample rates than 44.1 or 48 kHz, only set group 2
on the CC1 front panel to “x2” or “x4” and leave group 1 on “x1”. This because Pro
Tools “External Word Clock” input needs to receive the actual sample rate, but the
Loop Sync inputs always run at the base rate.
• Software settings:
Setup – session setup
1. Set Sync source to “Word Clock”. This configures the first unit to lock to ex-
ternal word clock and the others to loop sync (indicators light up).
Pro Tools in music production, CC1 slave
An alternative setup when using a Sync I/O as first unit in the chain is to assign the
Sync I/O master and slave the CC1 to its Loop Sync output. The advantage is that