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USING AUDIO
The DDX system fully supports stereo audio, with all audio devices being presented
at the linked host computer as USB audio devices. There are slight differences in audio
operation between DDX devices acting in a simple extender arrangement (without the
use of a DDX switch) and a full DDX matrix installation.
Using audio in a simple extender installation
The audio is presented to the computer’s operating system as a USB headset with
controls for input level, input mute, input AGC, sidetone level, sidetone mute, output
level, output mute and output balance. The audio device is permanently presented to the
computer when the DDX-CAM module powers up.
You can adjust the audio features using all of the standard operating system controls.
Note: Due to the architecture of the Codec, adjusting the input (microphone) level or muting the
input (microphone) will also affect the sidetone level and mute.
Using audio in a full DDX matrix installation
Audio functionality is enabled by default on all computers. For multi-head computers,
audio is only enabled for the primary transmitter, although two audio devices will be
presented to the computer, one for each transmitter. For multi-head consoles, audio is
only enabled for the primary receiver.
Managing audio in multi-user situations
•
In all connection modes, the audio output of the computer is routed to the receiver
from the transmitter.
•
In View Only and Shared modes, the receiver input audio is ignored.
•
In Exclusive and Private modes, the receiver input audio is routed to the transmitter.
Note: The above is equivalent to routing the output audio as per the video and the input audio
as per the USB (except in View Only and Shared modes, where the input audio stream is
ignored).
When viewing the OSD selection screen, input and output audio is suppressed.
The user who is currently in control of a computer can adjust the audio levels using the
standard operating system audio features; their changes will affect the audio for all other
users viewing the same computer. Additional users connected in View Mode, or additional
Shared Access users who don’t have control, can listen to the audio but at the volume
dictated by the main user. As a user switches between machines, their audio levels are
automatically adjusted to match their current connection.