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 Forum index » Clavia Nord Modular » G2 Performances - Experimental
Europa
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ian-s



Joined: Apr 01, 2004
Posts: 2662
Location: Auckland, New Zealand
Audio files: 42
G2 patch files: 625

PostPosted: Tue Jan 25, 2005 5:20 am    Post subject: Europa Reply with quote  Mark this post and the followings unread

(not the song by Thomas Dolby, the moon)

Another layered noise machine, this time as 3 voices in a polyphonic patch. The noise machine started life as a failed attempt at doing a forward/reverse sequencer controlled by a variable PWM LFO. The patch had an annoying glitch where the first or last step was sometimes skipped. I gave up on fixing it and instead used audio oscillators for the clock and PWM source. It gave a surprising variety of tones derived only by varying the two oscillator frequencies and the pulse width. I added a 4 tap delay with randomised delay time and feedback modulation, some filters and a compressor etc. Even with the compressor it is a little unruly, so take care with volume.
The noise machine sometimes controls a vocoder which is something Rob did in an earlier patch (to much better effect from memory)


Europa.prf2
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noise machines

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Last edited by ian-s on Tue Jan 25, 2005 7:02 pm; edited 2 times in total
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mosc
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Joined: Jan 31, 2003
Posts: 17935
Location: Allentown, PA
Audio files: 153
G2 patch files: 60

PostPosted: Tue Jan 25, 2005 7:31 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice sounds...

Yeah, I tried patching a PWM FWD/REV sequencer too and it's not trivial. I'm sure it can be done, but there are some little details to work out.

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ian-s



Joined: Apr 01, 2004
Posts: 2662
Location: Auckland, New Zealand
Audio files: 42
G2 patch files: 625

PostPosted: Tue Jan 25, 2005 3:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

I mentioned this patch was a bit unruly, basically the main volume envelope is made with a random sine LFO wave with DC offset added, then the bottom is cut off with a diode module. This creates soft edged lumps of sound that vary in height, duration and spacing. The trouble is, the noise machine can create some very loud obnoxious sounds which rudely drown everything else out. When this coincides with a big lump, it just goes on too long. I had just enough DSP to add an EnvFollow module (bottom right) with its output connected to the LFO rate modulation. Now a very loud sound will push the LFO rate higher so that the sound ends sooner.
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