eigendrum
148 points by bookofjoe 12 hours ago | 37 comments

letier 3 minutes ago
Not a fan of the cookie dialog. Had to close the page as there was no easy way to reject the ad cookies.
reply
totetsu 6 hours ago
reply
vanderZwan 2 hours ago
So in Dutch one expression for "that makes no sense" is "dat slaat nergens op", which literally translates to "that doesn't hit (slap, beat) anything".

A ruder variation of that is "dat slaat als een … op een drumstel", or "that hits like a … on a drum set".

For some reason I felt like sharing this trivia.

reply
spockz 2 hours ago
I never heard “op een drumstel”, always “op een varken”. So it would be “Dat slaat als een tang op een varken.” Or “That hits like pliers on a pig.”
reply
isoprophlex 43 minutes ago
"Als een tang op een varken" is the common one for me as well. Runner up: "Als een lul op een stadsbus" (it makes as much sense as a dick against a city bus)
reply
vanderZwan 39 minutes ago
Perhaps the "hits like an x on a y" family is larger than any of us thought?
reply
vanderZwan 42 minutes ago
Could be a regional thing. I've heard the pliers-on-a-pig version too, might be more common.
reply
shit_game 2 hours ago
Aunty Donna were so wise.
reply
BaselAshraf81 8 hours ago
Thanks for reposting this! I'm the developer (BaselAshraf81) - happy to answer questions or hear suggestions here.

If you find it interesting, a star on the GitHub repo helps a lot.

And don't forget to follow me on github, I build cool stuff!

reply
aureate 34 minutes ago
The title alone sounds like this would be interesting, but I'll never know if it is because it has a trackers popup listing thousands of "partners" and a load of "legitimate interest" boxes ticked by default. This is Daily Mail level stuff, immediate back button for me.
reply
jmole 6 hours ago
This reminds me of a tongue drum I have. Have you thought about building an iterative solver for specific scales?

It would be interesting if you could simulate and then print (or laser cut) your own instrument on demand.

reply
discordance 7 hours ago
Those ads are nasty and really take away from the cool stuff you build!
reply
slhck 22 minutes ago
You mean the cool stuff Claude built?
reply
stdatomic 7 hours ago
I just entertained myself with this for 30 minutes.
reply
brcmthrowaway 5 hours ago
Can you do this for a didgeridoo?
reply
moralestapia 8 hours ago
This is very cool stuff, indeed!
reply
Waterluvian 8 hours ago
I tapped twice and got nothing but sketchy popup ads suggesting I need to install a VPN. Does it work on safari mobile for anyone else?
reply
totetsu 6 hours ago
I didn’t get any sound on an iPhone either
reply
wickedsight 2 hours ago
You need to disable mute.
reply
latexr 46 minutes ago
> Does it work on safari mobile for anyone else?

It does for me. But I do use an ad blocker (Wipr 2).

reply
stavros 46 minutes ago
This website has a list of data vendors 200 pages long, and it forces you to uncheck each one if you don't consent. I decided to close the tab rather than deal with this illegal dark pattern.
reply
ttul 4 hours ago
Try `1 + 0.16cos(4t) + 0.08cos(12t + pi/6) + 0.04cos(36t + pi/3) + 0.02cos(108t + pi/2)`
reply
andai 9 hours ago
Very cool. Number keys and QWERTYU (or clicking the rows on the right) trigger the "modes" in isolation, which are surprisingly microtonal.

Also you can draw your own drums! What! That's so cool

reply
plaguuuuuu 4 hours ago
there's an amazing video on youtube about how metal bar/gong instruments (like gamelans) have different overtones, and regular western intervals instead of being consonant (like with vibrating strings) are dissonant - even perfect 5ths - and a totally different set of intervals are consonant (slendro and pelog tunings are a bit different for this reason).

thinking about it, each drum here would have totally different ideal scales to the others.

this is cool.

reply
g6taa 4 hours ago
Do you have a hint on how to find that video?
reply
telotortium 2 hours ago
It’s “The Physics of Dissonance”: https://youtube.com/watch?v=tCsl6ZcY9ag
reply
_flux 3 hours ago
This would be quite nice as a VST/CLAP for music production!
reply
b0ringdeveloper 5 hours ago
I'm not sure if I'm learning a lot. All of the shapes and click locations basically sound the same to me.
reply
bowsamic 4 hours ago
Very cool, reminds me of some of Aphex Twin’s percussive elements
reply
esafak 8 hours ago
reply
BaselAshraf81 8 hours ago
reply
gspr 4 hours ago
I've read hundreds of papers in my mathematics career, and they – good and bad – almost always blend into eachother and turn into a diffuse fog in my memory, where they're identified by "that good one by Johnson-something-I-think.. no the 90s one I think".

There are very few exceptions. Kac's drum paper is one. It's so nicely written!

reply
nxc18 6 hours ago
Thanks, ChatGPT.
reply
Jeff_Brown 9 hours ago
I love it. I wish I could select materials.
reply
tanderson92 8 hours ago
Selecting different materials would not change much. Call the frequencies \lambda_1, \lambda_2, \lambda_3...

You can prove that changing the material has no effect on the relative frequencies: \lambda_2 / \lambda_1, \lambda_3 / \lambda_1, etc. are completely independent of the material.

The shape is the determining factor; changing the materials (and hence the wave speed) just dilates the whole spectrum.

reply
BaselAshraf81 8 hours ago
There's actually a "ring-out" slider and a "mallet" width slider under the drum already.

Ring out controls how fast the higher modes decay (basically stiff vs soft material), The mallet width controls how many modes a strike can even reach, since a real mallet can't drive the high frequency ones very hard.

No labeled presets like "wood" or "metal" though, just raw sliders. Would be a fun addition if someone wants to map a few physically sensible combos to buttons. PRs Welcome!

reply
uwagar 5 hours ago
amazing stuff, congrats!
reply
valleyer 5 hours ago
[dead]
reply