Thunder

[Inventor]

Hi, I've been challenged by a colleague to make some really good thunder using ChucK. I have kijjaz's thunder models but they are not overly realistic. So I'm asking what approach would you take to making thunder? I need gentle rolling thunder, violent claps of thunder, spatialization with traveling, etc. So how would you do this?

Les

[Kassen]

Sounds like a really tricky thing.

Maybe download a few samples of real thunder and analyse what's going on in those?

[kijjaz]

yeah, how can we model a thunder sound? ..

I'm thinking..
(1) Sparking Mechanism --> I'm thinking about a line of low-frequency / DC burst.
(2) a set of delays that line of energy burst to simulate sounds reflecting between clouds .. so maybe we should have some cloud models etc...
(3) the filtering effects of the atmosphere / clouds.

seems chaotic to me wahahahha..

[Inventor]

Kij, nice modeling ideas. I have a great thing for a cloud model. It would be a Karplus Strong circuit. I have code for this to save you trouble if you decide to code up something. KS is a little resonant thingie that can be tailored to a loop frequency that is in the range of clouds.

Then delay lines between the clouds.

And what would the source be, a burst of noise?

Spatialization with Pan2 UGen on each cloud according to it's position (delay) etc.

Les

[Inventor]

Here is the Karplus Strong model:

[Inventor]

each cloud has an x,y,z position in the sky. Delays between clouds are proportional to the distance between them. Panning position is a function of x. Clouds move their positions slowly during the storm...

Les

[Inventor]

Guys I took a quick shot at it and didn't get far. Decided to employ a charging mechanism like neurons - you know, clouds charge up then they release into other clouds, who then charge up... causing chain reactions. Too early to tell though...

Les

[Inventor]

Here is some thunder. It has a charging mechanism and a charge transfer (lightning) mechanism between clouds. sound is panned according to x position. clouds self-lighten if a threshold is reached. clouds are connected together with nearest neighbor connections.

It sounds ok.

Les

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Thunder2.ck
Description:	Some Thunder	Download (listen)
Filename:	Thunder2.ck
Filesize:	3.65 KB
Downloaded:	314 Time(s)

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[Inventor]

OK i have the thunder more realistic now but it starts up with a resounding storm which eventually fades into nothingness. I need something more storm-like. Any suggestions?

Les

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Thunder4.ck
Description:	Some more Thunder (with issues)	Download (listen)
Filename:	Thunder4.ck
Filesize:	3.51 KB
Downloaded:	347 Time(s)

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