For decades, Aadam Jacobs recorded live music shows. His collection of over 10,000 shows since 1984 features Nirvana, R.E.M., The Pixies, Björk, Depeche Mode, The Cure, and so many more — and they're now available on the Internet Archive for free. https://kottke.org/26/04/online-treasure-trove-secret-concert-recordings