is there way to output melody into midi file?

[박진혁]

I'm impressed by these two works 

"https://codepen.io/teropa/pen/gvwwZL"

"https://codepen.io/teropa/pen/JLjXGK"

And I want to make a music sheet or midi file out of automatically generated melody & rhythm. You know, to use it in composing or make it playable on other devices.

But there seems to be no function for that in those two works.

So... I want to build it myself. is there a way to make an automatically generated melody into a midi file, in magenta? If so, can you give me the link to the tutorial? Thanks!