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 Forum index » Clavia Nord Modular » G2 Patches - Experimental
Squelch without filter
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Wan



Joined: Mar 31, 2004
Posts: 255
Location: Netherlands, Ugchelen
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PostPosted: Fri Jun 10, 2005 5:53 am    Post subject: Squelch without filter Reply with quote  Mark this post and the followings unread

I experimented with the AD and DA converters, and stumbled upon a filter sweep like effect. Var 2 and 3 has the most pronounced one.

i didn't expect this. Anyone understands why it is squelching?

I think it can be a usefull effect


ConvWave.pch2
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Grtz Wan
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mosc
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PostPosted: Fri Jun 10, 2005 8:35 am    Post subject: Reply with quote  Mark this post and the followings unread

I don't know why it squelches either, but I love the sounds. Changing the divider settings is quite interesting. This is indeed surprising. I would have never thought of trying something like this. Smile
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Axiom



Joined: Feb 19, 2005
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PostPosted: Fri Jun 10, 2005 11:36 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice idea Smile I've done a little patch that scrumble a wave using AD/DA convertors. I've used Random Pattern Generators to scramble bits of both AD and DA.. its funny Smile

Luca


ADDA.pch2
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mosc
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PostPosted: Fri Jun 10, 2005 12:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

I like this, but don't care for the repetition of the random patterns. Changes them to Random A modules and increased the rate a bit. This is great fun. The micorsounds people might like this. Smile


adda-b.pch2
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Variation on a random ad-da patch.

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Axiom



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PostPosted: Fri Jun 10, 2005 12:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool Very Happy I'd play much with those converters. Nice ideas can be developed with those.

Luca

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jksuperstar



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PostPosted: Fri Jun 10, 2005 12:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wan,

By doing the bit-selection the way you do inbetween the ADC and DAC, you're doubling certain bits, while throwing away others.

I made a simple graph using a spreadsheet, that is setup like most software compressors are- input on X-axis, output on Y-axis. To simplify, I only used 5 bits of adc/dac, but it easily makes the point here.

series 1 - linear (adc -> dac direct 1:1 connection)
series 2 - highest bit is used in place of highest & second highest bit.
series 3 - middle bit (bit 3 here) is used in place of bit 2 also.
series 4 - bit 5 (highest bit) replaces bit 5 and 4, bit 3 replaces bit 3 and 2 (somewhat combined series 2 & 3 ).

I use this method to create various look-up tables (that are larger than the 16 length (4 bit) sequencer/table that is available as a module. But I like the oddity you've come up with.

As for squeltching, it would depend on the divider/bit selection, and the frequency content of the input signal. In essence, (refer to the picture), a repeating wave (ie-frequency) would be jumbled up, in a repeating way. So in essence, you are moving the energy in certain frequencies to other frequencies. It'd probably be a good exercise to look at the "RAW" waveform and "DIST" waveforms through a FFT analyzer on your PC.


bit_munger.jpg
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example graph of "squeltch without filter".
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bit_munger.jpg


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Wan



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PostPosted: Sat Jun 11, 2005 7:24 am    Post subject: Reply with quote  Mark this post and the followings unread

jksuperstar wrote:

As for squeltching, it would depend on the divider/bit selection, and the frequency content of the input signal. In essence, (refer to the picture), a repeating wave (ie-frequency) would be jumbled up, in a repeating way. So in essence, you are moving the energy in certain frequencies to other frequencies. It'd probably be a good exercise to look at the "RAW" waveform and "DIST" waveforms through a FFT analyzer on your PC.


Thanks for this explanation, it is still a bit over my head, but the transfer of energy from frequencies to other frequencies is something that makes it a bit easier to grasp. I shall try to take a look at FFT analyses.

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Wan



Joined: Mar 31, 2004
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Location: Netherlands, Ugchelen
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PostPosted: Sat Jun 11, 2005 8:30 am    Post subject: Reply with quote  Mark this post and the followings unread

I think the basics of the squelch behaviour is in the swapping of the bits. In this patch all the bits are swapped and now it has a sync like character. But a very powerfull type of sync, much more pronounced than the normal sync input.

Var 5 is nearly chaotic, if you raise the leven of the ad further it is getting noisy [knob a:1:8].


adda sync.pch2
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Wan



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PostPosted: Sat Jun 11, 2005 3:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

Axiom wrote:
Cool Very Happy I'd play much with those converters. Nice ideas can be developed with those.

Luca


Sure, yours and Howards ideas are nice and promising. There are things happening in the patterns that catch my ear. I am going to delve further in this waveshaping with adda.

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Wan



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PostPosted: Sun Jun 12, 2005 5:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Another expirimental patch with ADDA.

I've made a matrix so you can set wich input bit will go to wich output bit [page b1]. So now you can explore what is the behaviour of the different mappings. And then the idea popped up to divide the different bits to see what that would bring [page b2]. Well, it introduces all kinds of harmonic series Shocked . Variation 7 and 8 are examples of that.
Added an input filter for the ADDA too, and that also has a great effect on the produced sounds.

I've made a quick setup for all variations to touch on a few ideas, but there is definitly more here.

Hope you enjoy!


Adda bitmatrix.pch2
 Description:
ADDA waveshaping with bitmatrix and bit dividers

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Axiom



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PostPosted: Sun Jun 12, 2005 6:29 am    Post subject: Reply with quote  Mark this post and the followings unread

lol i can't believe it Very Happy i'm been working to the same thing this morning Smile I will load your patch soon into my G2.

Luca

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PostPosted: Sun Jun 12, 2005 11:55 am    Post subject: Reply with quote  Mark this post and the followings unread

These sounds have a renaisance quality to them. Brings to mind a Christmas carole.


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O Come Ye Merry Gentlemen

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Wan



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PostPosted: Sun Jun 12, 2005 1:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
These sounds have a renaisance quality to them. Brings to mind a Christmas carole.

dancing

Very Happy

I know the tune, but i never expected this sound relates to it. Now where is that score of jingle bells?

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