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Comment by fenomas | Hacker News Reader

If anyone's interested in more examples, I spent last month doing a "thing a day" bunch of procedural music experiments with Web Audio. A couple of the ones that seemed to work:

* tries to create a semi-randomized fugue: http://aphall.com/2017/12/advent-18/

* jazz combo improvising over the title theme from Metroid: http://aphall.com/2017/12/advent-16/

* generates a chiptune over the progression of Autumn Leaves: http://aphall.com/2017/12/advent-17/

Caveat, they're likely too CPU-intensive for mobile devices.

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Love your autumn chiptune! Is the project open source? It would be amazing to be able to play around with its parameters.

Thank you! I wish I could say there was a cohesive thing with tunable parameters inside those demos, but basically each of them is a separate blob of ad-hoc ways of choosing scales, rhythmic patterns, etc.

The modular bit, which is reused across all the demos, is the bit that actually plays noises through Web Audio, and might be worth checking out: https://github.com/andyhall/soundgen

(If it's not obvious, there aren't any pre-made audio samples in the demos, all the noises are built at runtime out of Web Audio oscillators and filters and so on, inside that library.)

I took a look at other days of your musical advent. I think my favorite is day 23.

Day 4 strongly reminds me of the True Lab music from the Undertale soundtrack [1].

[1]: https://www.youtube.com/watch?v=y49b8aiQVBg - Undertale OST: 83 - Here We Are

Thanks! You are spot on about day 4 - most of the demos began with trying to imitate an existing track, especially structural stuff like how many voices there are, how often they enter and leave, how often the chords change, etc.

> Caveat, they're likely too CPU-intensive for mobile devices.

Mobile user here. Would love to be able to listen -- could you make recordings of the generated music and put up links to audio files?

Very nice. I really like your chiptunes on days 15 & 17.

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