Juniper Systems Allegro 2 User Guide - Manual (Page 33)

Ch 2 Hardware Components 29
Adjusting Audio Settings
To set audio options, tap on the top title bar and select the
audio icon from the list of applications that drops down. Or,
press Start > Settings > System > Audio.
The Audio control panel, Output screen, is shown:
From the Output screen you can adjust the speaker options.
Select the Input screen from the horizontal menu near the
top of the screen. You can adjust the onboard and headset
microphones as desired.