Audio quality can be verified by looping the sound directly from the Ubuntu input
source (Voice Input Module) to the output (speakers).
-
To enable loopback, open a terminal (CTRL + ALT +
T).
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In the terminal window, type the following command:
pactl load-module module-loopback latency_msec=20
(The command latency_msec=20 is optional. It helps to
minimize the acoustic feedback. Some machines do not accept the command and
may return error codes. In that case, just invoke module-loopback without
specifying latency.)
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If successful, this command returns a handle number. Invoking this command
multiple times generates multiple loopback instances with independent
handles.
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To disable the loopback, type the following command in the terminal window:
pactl unload-module x
Where x is the handle module number returned when
enabling the loopback. If the Smart Remote 3 is not connected and selected
as the audio input source, sound will be streamed from the computer
microphone to the computer speakers causing acoustic feedback.