Install xoscope by entering the following commands in the terminal:
sudo apt update sudo apt install xoscope
Description:
digital oscilloscope
Xoscope is a oscilloscope using input from a sound card or EsounD server and/or a COMEDI hardware. Includes 8 signal displays, variable time scale, math, memory, measurements, and file save/load.
Homepage: http://xoscope.sourceforge.net/
Version: 2.2-1ubuntu1
Section: universe/x11