## Combining waves - Schumann resonances

Using Nyquist scripts in Audacity.
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dmonty
Posts: 20
Joined: Sat Feb 25, 2017 9:15 pm
Operating System: Linux *buntu

### Combining waves - Schumann resonances

Working on combining frequencies. Is it best done with (sim [beh1 beh2 ...])? Or with a *table* of harmonics added together?
http://www.cs.cmu.edu/~rbd/doc/nyquist/ ... l#index612
http://www.cs.cmu.edu/~rbd/doc/nyquist/ ... ml#index25

Trying to emulate Schumann Resonances in audacity. These are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum.
https://en.wikipedia.org/wiki/Schumann_resonances
https://commons.wikimedia.org/wiki/File ... ectrum.gif
7.83 Hz (fundamental) 14.3, 20.8, 27.3 and 33.8 Hz

Thanks.

steve
Posts: 47320
Joined: Sat Dec 01, 2007 11:43 am
Operating System: Linux *buntu
Contact:

### Re: Combining waves - Schumann resonances

Difficult to say which is "best" as that depends on what you are doing.
(sim [beh1 beh2 ...]) is possibly easier to understand and use.
build-harmonic would be quite tricky for extreme low (and non-integer) frequencies.

As a simple example, to create a waveform that combines 7.83, 14.1 and 20.3 Hz:

Code: Select all

``````(mult 0.3
(sim
(hzosc 7.83)
(hzosc 14.1)
(hzosc 20.3)))
``````