Squelch without filter

Wan · Posted: Fri Jun 10, 2005 5:53 am Post subject: Squelch without filter

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

Description:

Download (listen)

Filename:

ConvWave.pch2

Filesize:

1.49 KB

Downloaded:

2500 Time(s)

mosc · Posted: Fri Jun 10, 2005 8:35 am Post subject:

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

Axiom · Posted: Fri Jun 10, 2005 11:36 am Post subject:

Nice idea

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

Description:

Download (listen)

Filename:

ADDA.pch2

Filesize:

2.79 KB

Downloaded:

2388 Time(s)

mosc · Posted: Fri Jun 10, 2005 12:03 pm Post subject:

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

Description:

Variation on a random ad-da patch.

Download (listen)

Filename:

adda-b.pch2

Filesize:

2.72 KB

Downloaded:

3711 Time(s)

Axiom · Posted: Fri Jun 10, 2005 12:56 pm Post subject:

Cool

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

Luca

jksuperstar · Posted: Fri Jun 10, 2005 12:58 pm Post subject:

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

Description:

example graph of "squeltch without filter".

Filesize:

45.18 KB

Viewed:

36477 Time(s)

This image has been reduced to fit the page. Click on it to enlarge.

Wan · Posted: Sat Jun 11, 2005 7:24 am Post subject:

Wan · Posted: Sat Jun 11, 2005 8:30 am Post subject:

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

Description:

Download (listen)

Filename:

adda sync.pch2

Filesize:

2.02 KB

Downloaded:

2284 Time(s)

Wan · Posted: Sat Jun 11, 2005 3:04 pm Post subject:

Wan · Posted: Sun Jun 12, 2005 5:35 am Post subject:

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

Download (listen)

Filename:

Adda bitmatrix.pch2

Filesize:

2.98 KB

Downloaded:

2241 Time(s)

Axiom · Posted: Sun Jun 12, 2005 6:29 am Post subject:

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

mosc · Posted: Sun Jun 12, 2005 11:55 am Post subject:

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

merry-gents.mp3

Description:

O Come Ye Merry Gentlemen

Who know why...

Filesize:

315.39 KB

Viewed:

3155 Time(s)

Wan · Posted: Sun Jun 12, 2005 1:24 pm Post subject: