Install banshee-extension-alarm by entering the following commands in the terminal:
sudo apt update sudo apt install banshee-extension-alarm
Alarm extension for Banshee
Banshee Alarm Extension is an extension for Banshee which allows alarms to be set in Banshee. Supported features include: * Wake up time * Ascending volume alarm with configurable start and end volumes as well as duration * Sleep timer . Banshee is a media management and playback application for the GNOME desktop.