Instruction manual

Io HD Installation and Operation Manual — Using The AJA Control Panel

Setup Tab Screen Settings

Analog Black Level—choices in the black Level pulldown menu are only available for

the two Composite analog formats. Choices presented are for US or Japan:

7.5 IRE (NTSC US)

0 IRE (NTSC Japan)

Lock Audio Gain To Unity—when set, the Io HD will ignore the Final Cut Pro gain

setting and set the audio gain at unity. Not setting this checkbox tells the Io HD

to get the audio gain setting from Final Cut Pro.

Analog Audio Monitor Level Audio—these radio buttons determine the audio level

that will appear at the Analog Audio Output RCA connector pair (“FSD” is full-

scale-deflection reading as measured on a VU meter). Select +18 for Europe or +24

for USA.

Active Video Output Filter—the Active Video Output Filter is designed to help

manage the comprehensive list of video outputs that may be available to

applications, particularly Final Cut Pro's A/V Devices tab.

The Active Video Output Filter is found in the middle of the Setup screen. By

selecting a checkbox next to a desired parameter, the video outputs related to the

specified parameter are enabled as possible video outputs for applications. As an

example, if the checkbox next to 25/50 is unchecked, 50Hz video outputs are

deselected and would not be available to the user in the A/V Devices tab of Final

Cut Pro. To avoid confusion when working in a particular editorial

environment, users might elect to leave 50Hz unchecked if they work solely in a

60Hz editorial environment. The same might be true for users who do not

intend to work with true progressive 1080 material.

Note: If a prompt occurs in Final Cut Pro stating that the AJA output device is

missing, this simply may be due to the Active Video Filter for a given parameter being

unchecked for the format being selected in the application. If this occurs, simply

make the appropriate selection in the Control Panel application and re-enter Final

Cut Pro where the selection should now be available.

Audio Delay—Beginning with version 6.0 of the Io HD driver, audio can be offset or

delayed for certain capture or monitoring situations where this would be

desirable.

Audio Delay sliders controlling input and output values are found in the Io HD

Setup screen at the bottom.

Audio Delay Input: Some devices have analog audio and digital video that may

be used as sources, but may not necessarily be in sync. The original Canon XL-H1

is an example of such a device. The HD-SDI output on this particular camcorder

does not include embedded audio. The camcorder does provide analog audio

outputs. These analog audio outputs, however, are not necessarily in sync with

the picture from the HD-SDI video output since they take different circuitry

paths through the camera. In a case like this, the Audio Delay Input feature may

be useful for offsetting the audio to match the video coming from the device.

Note: The Canon XL-H1s, a newer version of this HD camcorder, includes

embedded audio in the HD-SDI output and analog audio and digital video need not

be used.