PRG Mbox - Page 115

105
MBOX® USER MANUAL
Note: When using a timecode sync playmode on a layer, If the in-frame parameter is modied, the movie will start from
the new in-frame when the linked time is reached, rather than from the movie’s rst frame.
The Timecode Offset channel on each layer allows modication of a le’s start time by approximately 4 seconds without
having to rename the le and rescan the content. The offset value options are:
+ 0 > 126 - Positive offset (movie plays later) -> 1 point = 1 frame
+ 127 - Default, no offset
+ 128 > 255 - Negative offset (movie plays sooner) -> 1 point = 1 frame
Receiving SMPTE Timecode
SMPTE (LTC) timecode input to the Mbox application may be achieved in one of two ways. The preferred method is
through an audio input to the Mbox computer. (Refer to “Audio Input” on page 101 for more information) An alternate
method is through an audio input to a separate computer that is running the TC Reader application.
Receiving timecode directly into the Mbox application is preferred because it eliminates any potential delays or data
issues that might affect the network trafc between the Mbox computer and the computer running TC Reader. Also, the
Mbox v4 software is able to automatically detect the incoming timecode framerate and format, speeding up the locking
to timecode and eliminating the need to provide compensation for 29.97ndf timecode.
Eliminated Feature: With the release of Mbox v4.1, the ability for the Mbox Remote application to receive and
distribute timecode over the network has been removed.
Receiving MIDI Timecode
MIDI timecode input is achieved through a MIDI/USB interface connected to the computer. When using a MIDI/USB
interface, the TC Reader application must be used.
CAUTION! MIDI/USB devices may require the installation of drivers in order to work.
Setup for Timecode Input
To receive timecode directly into the Mbox application, follow the guidelines for audio input on page 101. If Mbox is
receiving an audio signal, then no other steps need be taken aside from selecting the audio interface for input. However,
if Mbox is receiving timecode over the network from the TC Reader or Mbox Remote applications, then follow the
guidelines below.
Note: Timecode input can be monitored using the [F10] Timecode HUD. Refer to “Activity/Timecode Monitoring” on
page 68.
TC Reader
The TC Reader application may be used to receive timecode on either a separate computer or the Mbox computer. The
TC Reader application reads the actual timecode signal (SMPTE or MTC) and retransmit it over the network to the Mbox
application.
When using TC Reader to receive a SMPTE audio signal, the computer’s audio input must be congured correctly. TC
Reader can only use the default audio input interface on the computer as its input and only allows the selection of left vs.
right channel. The default audio input to the computer could be the line-in connection or a USB/FireWire interface.