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Io Express Installation and Operation Manual — Easy Setups for Typical Uses
QuickTime Audio Settings
—these settings select an audio input source and affect how it’s
processed by Final Cut Pro. The
Device
pull-down should be set to AJA Io Express. The
Input
pull-down selects that Io Express (AJA Io Express) will be used for capturing audio—it does
not select the specific inputs. For specific audio input selection use the Io Express Control
Panel. The
Rate
pull-down selects a sample rate; it should always be set to 48 kHz for Io
Express. By clicking on the
Advanced
button, a new screen will be displayed where you can
select between 8- and 16-bit sampling—AJA recommends 16-bit for optimum sound
quality. (This has nothing to do with input format, as Io Express supports 20-bit SD
embedded audio.)
The Device Control Presets Window
Audio/Video Settings, Device Control Presets Window
This window selects machine control parameters for an attached VTR. Your choice here tells
Final Cut that Io Express is handling the machine control parameters for the VTR attached to Io
Express. Alternatively, you could also select a different device for input/output instead of Io
Express.
For example, if you have a IEEE 1394 camcorder attached to the Mac’s FireWire port you might
choose “FireWire NTSC.” The information on the right window pane describes the current
machine control settings and parameters for the VTR attached. For Io Express presets this means
the VTR attached at the RS422 port on Io Express. For non-Io Express presets, this means
camcorder/VTRs attached directly at the FireWire port or via some other interface.
If you select a preset you can edit it (click the Edit button) or copy and rename it as another (click
Duplicate). The only exceptions are those presets marked with a lock icon; those can be
duplicated, but when you try to edit one the system will report they’re locked and can only be
copied (it will create the copy when you try to edit).
When editing a Device Control preset you can change the following:
•
Name and description of Device Control preset
•
Protocol for capture/playback VTR (for Io Express this will be RS422)
•
Audio Mapping
•
Time Source (LTC/VITC/both/etc.)
•
Port
