User guide

2-9
Basics
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2.5 Audio in the I/O Tool
The DVS software provides a full support of audio during record or
play-out operations. Up to 16 different channels of audio can be in- or
output by the system. The audio data can be accessed and processed
in the software as easily as the video material.
When performing a record operation, the audio data can be input ei-
ther embedded in the video signal (audio in video, AIV) or via the sep-
arate digital audio connectors. You may have both signals connected to
the DVS system and prior to a record you have to specify the type of
signal that the system has to capture (see section “The Audio Format”
on page 5-7). However, for an input of audio data a sampling rate of
48 kHz is supported only. In case you want to capture audio alone, a
video signal has to be present at the system’s input(s) and the video for-
mat settings have to be set accordingly. Regarding the created files, you
can select between several file formats for audio (e.g. *.aif or
*.wav). Additionally you can specify whether multiple channel files
(one file per created record subdirectory containing multiple channels
of audio) or mono/stereo files (if applicable, several files containing
each a mono channel or stereo channel pair) should be written.
On the other hand, when performing a play-out operation, you do not
have to configure the way a play-out of audio is performed. It will be
played out simultaneously, embedded in the video signal (AIV) as well
as via the digital audio output connectors. But because some external
devices have difficulties when handling embedded audio that provides
more than four audio channels, the number of channels given out via
AIV can be configured freely with the DVS software. You can set the
amount of audio channels that will be embedded in the video signal in
the video output settings (see section “The Video Format” on
page 6-2).
The selection area of the I/O Tool provides in each task mode 16 audio
peakmeters – one for each audio channel – to monitor audio during
record or play-out operations:
The optionally available VTR task mode uses sparse files when
recording audio, i.e. they reserve the amount of data which can
be recorded with audio (per record subdirectory), even if it has
not been recorded already. The maximum amount of data up
to the latest captured audio outpoint will be available in the au-
dio files.
When performing record operations on externally connected
equipment (DVS system is player), you can more conveniently
limit the AIV channels sent out by the DVS system with a set-
ting available in the device’s profile (see “CLIPSTER Configura-
tions” user guide for more information about this).