This is fantastic. The one-handed organ keyboard is a work of genius, and it all feels like very simple organic technology: sets of tuned car horns are really cheap, and the rest is just a matter of wiring.

I'm severely tempted to buy a bunch of car horn parts and build my own MIDI-controllable one - every bit of this I can either buy on Amazon or 3D print.

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yostrovs a day ago | parent [-]

These are not electrically powered horns. Surely you can imitate them though.

	▲	lambdaone 10 hours ago \| parent [-]
		No, they're not electrically powered, but given that you can buy an electrically-powered 5-horn kit from eBay for $20, it's certainly the cheapest way to go for a typical HN-reading hobbyist/hacker. Getting 14 horns is then $60, and the rest is relays a microcontroller, and a bit of 3D printing for the horns. Which is an interesting nerd-sniping exercise in itself: https://www.grc.com/acoustics/an-introduction-to-horn-theory...