Degree of compressibility is an interesting tool that serves many purposes. One that I like is Normalized compression Distance (https://en.wikipedia.org/wiki/No

Degree of compressibility is an interesting tool that serves many purposes. One that I like is Normalized compression Distance (https://en.wikipedia.org/wiki/Normalized_compression_distance https://en.wikipedia.org/wiki/Normalized_compression_distanc... is a light starting point). With NCD you can measure, for example, how similar two lyrics are, or even group similar songs together.