Install wmix by entering the following commands in the terminal:
sudo apt update sudo apt install wmix
Description:
Dockapp mixer for OSS
Allows toggling record source, muting individual channels, adjusting volume and balance, all in a compact dockapp size, with TV-like on-screen-display for volume levels. . Supports mousewheel to adjust current channelvolume and can be controlled remotely with SIGUSR1 / SIGUSR2 to adjust the volume. Keeps a simple configuration file for user-defined settings.
Homepage: http://www.dockapps.net/wmix
Version: 3.3-1
Section: universe/x11