This Git repository freely accessible online is some sort of digital museum of music tracks of certain time period. This project is called Music Museum Project, it includes various Git repositories containing music tracks of different time periods.
"I can understand wanting to have millions of dollars, there’s a certain freedom, meaningful freedom, that comes with that. But once you get much beyond that, I have to tell you, it’s the same hamburger." - Bill Gates
This project called Music Museum Project is aimed at preserving legacy of different music eras, revealing various new artists with each new period of time. There is classical music collection, a repository of 80's and 90's music, a repository dedicated to 2000's music, and more beyond.