SI: I have the flight radar 24 set up, and in the first stages when I got the little USB receiver did download a program that talked to the chip to make it a frequency agile radio. I tuned in a local FM station, and could select many options, including bandwidth, display, etc. I was overwhelmed, and basically for $20 plus some free software that developers and hobbiests had already developed. I still am stuck in the world of resonate circuits and those approaches to receiving signals, which my ham radio and advanced electrical technicians say will still be the basis of stuff, but the new approaches are way beyond that now.
If you have a RPi, then the little USB thing is very easy to get for $18 to $20 and I had enormous fun playing with it before dedicating it to listening to the transponders of the aircraft flying over, now it is sort of an appliance feeding info like Jachym mentioned with the seismographs .
Oh, thinking a 'cheap' radio like the chip would give 'cheap' sound, I was equally amazed at the quality of the sound that my comuputer generated though a good set of earphones plugged into my sound card. A local university has a low power station that does a lot of classical music in the evenings and I got caught up enjoying all the clarity and bandwidth my old ears can pick up. It made listening to FM very enjoyable. Much different than the limited .mp3 quality that I have gotten used to tolerating. So if you haven't played around, it is a great thing to do.