Install libout123-0 by entering the following commands in the terminal:
sudo apt update sudo apt install libout123-0
MPEG layer 1/2/3 audio decoder (libout123 shared library)
mpg123 is a real time MPEG 1.0/2.0/2.5 audio player/decoder for layers 1, 2 and 3 (MPEG 1.0 layer 3 also known as MP3). . This package contains the shared out123 library.