Audio Input - PRG MBOX User Manual

Audio Input

In addition to be able to output audio, the Mbox application can receive audio. New in Mbox v4 is the ability to receive
SMPTE timecode audio directly into the Mbox application for the purposes of timecode synchronization or for the
MboxTime playback synchronization functionality.
Receiving timecode as an audio signal directly into the Mbox application has several advantages over the previous
method of receiving timecode in a separate application (TC Reader) and then transmitting the timecode to the Mbox
application over the network.
The setup for getting Mbox to receive audio is similar to that for selecting the audio output interface/device. In the Audio
section of the Preferences tab there is a preference for audio input. As with the output preference, this is pop-up that
allows the selection of desired input interface or device. The same guidelines exist for selecting available devices, Mbox
remembering the selection, and what happens when the interface/device is not available when the application launches.
Guidelines:
+ When an audio interface/device is selected, all timecode input for playback synchronization will be received as
SMPTE LTC timecode on that interface/device. This is the recommended setup for Mbox v4. Mbox will ignore any
network timecode (as from the TC Reader application) in this case.
+ When the item labeled "None" is selected, Mbox will ignore any timecode input on audio interfaces/devices and will
listen to timecode over the network from the TC Reader application instead.
+ With audio input direct to the Mbox application, it may be necessary to provide some "upstream" gain control for the
audio signal to make sure that the signal is loud enough, but not so loud as to be clipping. Mbox does not require a
particularly loud signal for timecode.
Refer to "Timecode Synchronization"
Refer to "MboxTime" on page 109 for information on the MboxTime functionality.
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on page 103 for information on using the timecode input to synchronize playback.