Specifications

Chapter 35: Working with Synchronization 565
4 Click the Machine Control tab in the Periph-
erals dialog.
5 In the MIDI Machine Control section, enable
MMC.
6 Select your external device from the Send To
pop-up menu. The list of available devices is de-
termined by your Windows Multimedia Setup
or the OMS devices configured in your OMS Stu-
dio Setup (Mac OS 9).
The port on which this information will be
transmitted is set in the “ID” field. MMC com-
mands contain an ID number to identify which
machine should respond to the MMC com-
mand. There are 128 MMC ID numbers, from
0–127. The default of ID #127 is a special setting
that broadcasts to all 128 MMC IDs. With this
setting, any device on the specified port will re-
spond to MMC commands.
7 Set a pre-roll time for your MMC device. Pre-
roll is needed to provide Pro Tools with suffi-
cient time to lock to the incoming time code.
This value will vary depending on the external
device. If the pre-roll time is insufficient,
Pro Tools may not be ready to lock until after
the current time code position has passed.
8 Click OK to close the Peripherals dialog.
Pro Tools will now be able to control the se-
lected device’s transport.
Operating the Pro Tools Transport with
MMC
You use the Pro Tools Transport window as the
remote controller for all your enabled devices
(MMC units, ADAT, or a nonlinear video deck).
To do so, set the enabled devices to listen to the
address you enter for MMC. The Transport win-
dow will then “drive” Pro Tools transport and
any slaved devices.
You can also configure a “Pro Tools master,”
which can “drive” other devices (as needed),
and to which Pro Tools will chase (slaving
Pro Tools).
To control external devices from the Pro Tools
Transport Master:
■ Select either Pro Tools or MMC from the
Transport pop-up in the Pro Tools Transport
window. The selected item will act as Transport
Master.
When the Transport Master is set to Pro Tools,
the playback position is governed by the on-
screen cursor in Pro Tools.
When the Transport Master is set to MMC, the
playback position is governed by the external
device’s play position.
For more information, see “Recording from
MIDI Devices” on page 175.
MMC Transport Settings
When using MMC, you can set the following
options for machine transport behavior in the
Operation page of the Preferences dialog.
Machine Control page of the Peripherals dialog
Choosing a Transport Master