[music-dsp] Wind in Trees - how to synthesize

[Richard Dobson]

It seems to me there must be a difference between "Wind across the 
moors" and "wind in trees". The latter must surely have some element of 
branches+leaves rustling.

This suggests to me that granular synthesis is the technique of choice, 
with a grain equating to an individual leaf- or branch-rustle (still 
synthetic - a grain = filter-enveloped noise with attack/decay). Could 
be combined with processed white-noise too, no doubt. Stereo granular 
synthesis (where each grain has a defined position) would be the next 
level of enhancement, and (if you are inside the wood) a full surround 
implementation (B-Format?) would persuade the soul.

Richard Dobson


kyokpae wrote:

> Hello Mark,
> 
> 
>>For a piece I am working on I want to synthesize a
>>sound like the sound of wind in the trees - for
>>various reasons I want to synthesize this rather than
>>sample it.
>>
>>My guess as to an approach is to filter white noise but
>>I am not sure what the best approach is - has anyone
>>got any experience of making this kind of sound? and
>>is anyone able to give me any pointers..
>>
> 
>    You are right. The noise is a basis. To make it sounds more windy us a LP
> filter. Add a LFO (with few seconds attack and a frequency of let say 0.1
> Hz) and make it change cutoff freq. of the filter. Then add second LFO with
> shorter attack and shorter phase that will change resonance of the filter.
> You can also make another source of wind that will have higher cutoff freq.
> than the first and quick changing resonance (ca. 1Hz). This will make your
> wind 'whistle'. Add a reverb with long decay and that should give you fine
> 'wind in the trees' sample.
> 
>    Anyone else got some suggestions? I'm also interested how to make it
> sounds better.
> 
> greetings
> Marcin Olak
> 
> 
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> 




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