Matrox MXO2 PCIe Host Adapter - Manual (Page 251)

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Specifying your settings for Matrox ISO recording
Unless you choose to record embedded audio only, separate .wav or .aac
audio files will be created for the first two, four, six, or eight audio
channels from your audio source respectively (the number of available
audio channels depends on your selected audio source).
• Audio Bit Depth If 2 , 4 , 6 , or 8 is selected for Audio Channels , select
the bit depth that you want for your recorded audio.
• Audio Channel Type If 2 , 4 , 6 , or 8 is selected for Audio Channels ,
select the channel type that you want for your recorded audio:
$
Mono Creates a separate .wav or .aac audio file for every selected
channel. For example, if four audio channels are selected, four mono
audio files will be created. The embedded audio in an
.mov file will also
be mono (not supported for embedded audio in an .avi or .mp4 file, which
is always stereo).
$
Stereo Creates a separate .wav or .aac audio file for each audio pair
selected. For example, if four audio channels are selected, two stereo
audio files will be created. The embedded audio in an
.avi , .mov , or .mp4
file will also be stereo.
¦ Note Separate .wav audio files can have a maximum file size of 4 GB. See
“WAV audio recording” on page 230 for the approximate maximum duration
for a separate .wav audio file based on the audio settings. This limitation does
not apply to separate .aac audio files.
• Embedded audio only Select this if you want to embed the first audio
pair (channel 1-2) in the video file only. Separate audio files will not be
created (the
Audio File Type will be ignored). If you’re recording to an .avi
or .mp4 file, the Audio Channel Type will be set to Stereo .
• AAC bit rate For AAC audio, drag the bit rate slider to select the bit rate
(in kilobits per second) that you want for your recorded audio. This slider is
available for separate
.aac audio files and embedded audio in .mp4 files only.
Saving and loading record presets
Once you’ve specified the Matrox ISO record settings that you want for a Matrox
input, you can save your settings as a custom preset and load the preset at any
time to apply those settings to an input in the
Matrox ISO Record dialog box.
Matrox presets are provided for recording .mp4 files on devices that have Matrox
MAX technology. You can load and customize these presets as needed to suit
your needs.
• To save your settings for a Matrox input as a custom preset, click beside
the input and choose Save Preset . You’ll then be prompted to enter a name
for your preset. Because the video file type is saved in the preset, you should
include the video file type, such as AVI, in your preset name so that you can
easily identify your custom presets.