
AT-OMNI-121 / AT-OMNI-122
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Configuring Audio Output
In addition to passing audio directly from the encoder to the decoder, both the AT-OMNI-121 and AT-OMNI-122
provide two additional audio options
•
HDMI audio can be de-embedded and output to two-channel analog audio.
•
Two-channel analog audio can be embedded and output over HDMI.
This section covers both methods.
If using a single-channel decoder, only a single
AUDIO IN
and
AUDIO OUT
port
will be available.
De-embedding audio will extract the HDMI LPCM audio and automatically downmix to two-channel analog audio,
using the included captive-screw connectors.
De-embedding Audio
1.
Connect the power supply to the DC 48V connector on the decoder.
2.
Connect the included 5-pin captive screw connectors to the
AUDIO OUT
ports. Refer to
for wiring information.
3.
Login to the decoder and click
HDMI Output
in the menu.
4.
Scroll down to the
Audio
section and click the
Analog Power
toggle switch to enable it. When enabled, the
toggle switch will be orange. The
Analog Power Status
indicator, above the toggle switch, will be green. This
indicates that the external power supply is connected to the decoder.
Audio from the source will now be heard on the
ANALOG OUT
port of the decoder. Note that when audio is de-
embedded, it will not longer be audible using the HDMI OUT ports on the decoder.
Device Operation
Embedding audio will replace the existing HDMI audio source, normally heard on the output of the decoder.
The analog audio will be heard on the
HDMI OUT
port of the decoder.
Embedding Audio
1.
Connect the power supply to the DC 48V connector on the decoder.
2. Connect the audio source to the
AUDIO IN
ports, using the included 5-pin captive screw connectors. Refer to
for wiring information.
3.
Login to the decoder.
4.
Click
HDMI Output
in the menu bar.
5.
Scroll down to the
Audio
section and click the
Analog Power
toggle switch to enable it. When enabled, the
toggle switch will be orange. The
Analog Power Status
indicator, above the toggle switch, will be green. This
indicates that the external power supply is connected to the decoder.
Audio from the source will now be heard on the
HDMI OUT
ports on the decoder.
IMPORTANT:
When using analog audio inputs on the OmniStream decoder, the decoder must
be powered using the 48V power supply (AT-PS-48083-C). This power supply is sold separately
and can be purchased from Atlona.