i heard some good lyrics, then a good song, i couldn't resist making a remix available here :
https://paste.chicagotea.click/p/fish-gecko-otter
for 1 week only, after the mixtape autodestroy to preserve the copyright thingy but you can use it for the mod if you want

i request authorization to include in my dj mod ( under public domain ) for preservation purposes if that is not against the law of the copyright and the will of the original artist

This isn't my song or anything, this is from here: https://www.youtube.com/watch?v=W2dxblz6m54. If you want to make the remix version into a mod feel free, just fork the repo on github and replace shreksophone.ogg with your own ogg file and it'll work.

Ok i documented about the meme now, i felt like an old person for a bit, then i listened to the song again, thanks for pointing source, maybe i will finetune some detail, but i'm planning on adding it to : https://mods.factorio.com/mod/PI-house-made-music , i was worried the remix wasn't introducing enough variation in the melody but now i think it will do fine.
I had another look at your code and learned a few stuff :)