[sdiy] wave/surf machine

[Dave Krooshof]

>Since they are being so picky about not using samples, I suggesat making an
>actual wave machine, bottles with water & pebbles in with contact mikes, and
>some mechanism to tip them over rhythmically.
>I have an African "rain maker", a long hollowed gourd with seeds in it, that
>is turned upside down during rainmaking ceremonies, it sounds eeriely like ,
>well, rain!!!
>takes 20 seconds per wave, at the right angle of tilt. Then you just reverse
>it (there are baffles inside, I think)
Originally, they are cactus stems with the needles broken off and pushed
inside. This is obstructing the fall of the seeds.

It's an mechanical granular synthesizer.


Qua wave synth...

I live very close to the sea. I listened to it a lot. I decided I do not
like the sound, although it's interesting...

The hollow space underneath the rolling waves are resonance chambers
that change pitch over time. To mimick these, you need several Bandpass
filters, and vary their pitch similar, but not the same as the volumes...

Waves do come in on a very regular basis. An LFO will do. There are
two noise sources:
1. The falling drops in the water, and bubbles that come to the 
surface. (white)
2. The method of rolling over:
What amazes me is that the sea-noise is not constant at all.
Sometings it's near-silent for a short while. At other moments, the waves
do not roll over from the middle to the ends, nor from one end to another,
but over several meters at the _same_ moment.
This is causing a peak in the amplitude, and, as the rolled over wave
forms the shape of a tube, a resonating "BOOMF" is heard.

So you need a LFO noise source that has spontanious drops and heavy peaks in
it's values.
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groets,

_          >^v<        _

website http://www.dendriet.nl