Install ukui-media by entering the following commands in the terminal:
sudo apt update sudo apt install ukui-media
Description:
UKUI media utilities
UKUI media utilities are the audio mixer and the volume control applet. . This package utilizes the libmatemixer library which provides support for ALSA and Pulseaudio as audio backends.
Homepage: http://www.ukui.org/
Version: 1.1.2-0ubuntu1
Section: universe/x11