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).
-
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.
-
If successful, this command returns a handle number. Invoking this command
multiple times generates multiple loopback instances with independent
handles.
-
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 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.