Owner's manual

COM Setup

The 664 features an unbalanced stereo COM Send (TA3) and an balanced mono COM RTN (TA3) for

communications purposes. These special input and output channels can be used to privately com-

municate with a boom operator or other member of the production crew.

During operation, it is possible to interrupt the Com signal and speak to the boom operator via the

slate mic by Holding down the Select Encoder and sliding the Slate/Tone Switch to the left. The

green Slate LED will illuminate to indicate that the slate mic is routed to the Com Send. During this

time, the slate mic signal is sent only to the Com Send Output and right Headphone output, but not

to record tracks or any other outputs. To cancel slate communication and resume the Com Program,

slide the Slate/Tone Switch to the left again. The green Slate LED will turn off.

The gain of the Com Send and Com Return can be adjusted from the Setup Menu options

COMMS/RETURNS > Com Send Gain and COMMS/RETURNS > Com Return Gain, respectively.

COM Send Program

By default, the program sent to the COM Send output is the Left and Right Stereo Bus. To change the

program of the COM Send:

1. Enter the Setup Menu and select COMMS/RETURNS.

2. Select the Com Send Program Option.

3. Turn the Headphone Encoder to select the desired source, and press the Headphone Encoder

to toggle the assignment of the source to the Left or Right side of the COM Send.

4. Optionally, slide the RTN switch to toggle mono or stereo of the COM Send.

Com Program Auto-Mute

By default, the Com Send program will mute when slate communication is engaged. This helps

the boom operator hear the voice of the 664 operator. This behavior can be disabled so that the

Com Send program is not muted when communication is engaged via the Setup Menu option

COMMS/RETURNS > Program Auto-Mute.

664 User Guide and Technical Information

v. 2.02 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.

COM Setup