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 Forum index » Instruments and Equipment » WREN
Oscillator with harmonics control
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Wobble



Joined: Feb 11, 2017
Posts: 70
Location: Denmark
Audio files: 1

PostPosted: Sat Feb 11, 2017 9:25 pm    Post subject: Oscillator with harmonics control
Subject description: Suggestion
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How about a oscillator where you can control the harmonics. So for example you can adjust the gain of the 4th harmonic etc..

Verbos makes one, its very cool.

Btw. great and super awesome program. Smile
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blue hell
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Joined: Apr 03, 2004
Posts: 24079
Location: The Netherlands, Enschede
Audio files: 278
G2 patch files: 320

PostPosted: Sun Feb 12, 2017 7:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks!

Posted Image, might have been reduced in size. Click Image to view fullscreen.

For harmonics you can use the ChebGen module [ http://bluehell.electro-music.com/modules/modules.html#326 ] - feed it with a sine osc (and have it work in sine mode) and put a mixer after. The documentation is a bit poor I see - but it makes double, tripple, .. etc. the frequency and it does this for sines, triangles or saw waves (depending on the selected mode).

Most - if not all - mixers have gain control inputs so with a couple of LFOs added you can make ever changing harmonics.

This could be put into one module of course, but all the parts can do so much more :-)

Posted Image, might have been reduced in size. Click Image to view fullscreen.

_________________
Jan
also .. could someone please turn down the thermostat a bit.
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Wobble



Joined: Feb 11, 2017
Posts: 70
Location: Denmark
Audio files: 1

PostPosted: Sun Feb 12, 2017 2:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

great thanks.
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Wobble



Joined: Feb 11, 2017
Posts: 70
Location: Denmark
Audio files: 1

PostPosted: Wed Feb 22, 2017 6:50 am    Post subject: Reply with quote  Mark this post and the followings unread

Your comment about ChebGen in another thread, made me reread your reply here, and play around some more with ChebGen module.

This was actually not what I meant, strictly speaken.

First of all I would like to use something like a square wave as input, since a sine wave has no harmonics.

The harmonic breakdown of a square wave is (in sine waves):

1st: No amplification, same freq
2nd: Empty
3rd: 1/3 amplification, 3 x freq
4th: empty
5th: 1/5 amplification, 5 x freq
6th: empty

etc etc., so when adding together them all until infinite harmonic, then we get back our square wave.

Hmm, thinking now about generating this, it would probably cost alot of CPU, especially if it don't know the shape of the incoming signal and would have to do Fourier analysis on it, so never-mind. Wasn't a feature I really dreamed about having anyway. Just wanted to explain that I meant something else. Smile
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