Songs are unlicensed

[SeanLuke]

I was hoping to use this song data in an open source project also hosted here on Github, with lots of attribution etc. However at present the code is not licensed with an open source license (or indeed with any license). The author helpfully states "You can use the sketches for anything, I only kindly ask that you give credit if you use these codes on a tutorial, video, example, etc.", but this isn't sufficient to include code in an open source licensed project.

May I suggest that the author perhaps license the code as MIT or (better yet) Apache 2.0? It'd help a lot.