Pro Tools as MMC Master
When Pro Tools is the Master, it sends MMC commands to the slave device and receives MTC information back from the slave device.
To slave an external device to Pro Tools using MIDI Machine Control:
1 Connect a MIDI Out port on your Pro Tools MIDI interface to an appropriate port on the slave device.
2 Connect the MTC out from the slave device to a MIDI In port on your Pro Tools MIDI Interface.
5 From the MTC Reader Port pop-up menu, select the MIDI In port to which the slave device is connected (the source of MTC information from the slave device).
8 In the MIDI Machine Control (Master) section, select the MIDI Out port to which the slave device is connected from the pop-up menu.
9 Set the MMC ID number for which this information will be sent in the “ID” field.
MMC commands contain an ID number to identify which machine should respond to the MMC command. There are 128 MMC ID numbers, from 0–127. The default of ID #127 is a special setting that transmits to all 128 MMC IDs. With a setting of 127, Pro Tools will transmit MMC commands to all MMC IDs.
10 Set a pre-roll time for your MMC slave device. Pre-roll is needed to provide the device with sufficient time to lock to the timecode transmitted by Pro Tools. This value will vary depending on the external device. If the pre-roll time is insufficient, the device may not be ready to lock until after the current timecode position has passed.
Pro Tools will now be able to control the selected device’s transport and act as the clock master.
13 To have the Pro Tools transport chase the playback location of the slave device, click the Online button in the Transport window.