Enabling Phantom Power to Microphones – EasyIP Mixer
A
UDIO PAGE
, A
NALOG TAB
To supply 48 VDC phantom power to a microphone connected to a Line/Mic input, check the Phantom
Power checkbox below the controls for the appropriate input.
About Echo Cancellation
When a microphone picks up the audio from a speaker (far-end audio) during a conference, it sends the far-
end audio back to the participants at the far end, creating an echo. Acoustic echo cancellation prevents
this.
Here's how it works:
1. The speaker feeds the far-end audio into the room. This signal also goes to the audio processor as the
reference that needs to be canceled.
2. The audio processor inverts the signal and sends it to the microphone.
3. The sum of the audio that the microphone picks up from the speaker and the inverted signal is 0: The
echo is canceled.
With the audio from the speaker canceled out, the audio from the microphone includes only the sounds
originating at your end of the conference.
The EasyIP Mixer can use any of its audio outputs as the signal reference for acoustic echo cancellation.
Select the AEC Reference at the top of the Analog or Matrix tab of the Audio page.
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Complete Manual for EasyIP Systems
