3 Quick start
Doc. ID 4374_139 v1.1
Page 18
3.7.2 Listening to audio quality
Audio quality can be verified by looping the sound directly from the Ubuntu input source (Voice Input
Module) to the output (speakers).
1. To enable loopback, open a terminal (CTRL + ALT + T).
2. 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.)
3. If successful, this command returns a handle number. Invoking this command multiple times generates
multiple loopback instances with independent handles.
4. 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.
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