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Scream Filter!!!


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#1 grymmjack

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Posted 31 January 2012 - 09:16

:panic: :yeah: :dribble:

Completely awesome. What is the magic behind it? Someone has to know :)

I'd like to know...
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#2 SpeedWell

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Posted 31 January 2012 - 09:27

errr... RTFM? http://tutorials.ren...s#Scream_Filter

#3 noby

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Posted 31 January 2012 - 09:38

To be honest I've never understood how the shift distortion actually works.

#4 Kabelfoster

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Posted 31 January 2012 - 10:14

errr... RTFM? http://tutorials.ren...s#Scream_Filter


Your mother must be so proud

#5 mr_mark_dollin

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Posted 31 January 2012 - 10:34

It's the sound of the bits and bytes pining their expiry. ;)
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#6 grymmjack

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Posted 31 January 2012 - 20:22

I guess I should have been more explicit; what is the filter type behind here? What is the process that applies the distortion? That kind of stuff. I know how to use a filter :) I'm speaking strictly in terms of the DSP under the hood.
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#7 SpeedWell

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Posted 02 February 2012 - 07:26

Your mother must be so proud


What is that supposed to mean? I'm just referring him to the manual.
Apparently I wasn't the only one who misinterpret his first question. :P
So he rephrased his question, which makes more sense now. :)

#8 Djeroek

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Posted 02 February 2012 - 14:59

I guess I should have been more explicit; what is the filter type behind here? What is the process that applies the distortion? That kind of stuff. I know how to use a filter :) I'm speaking strictly in terms of the DSP under the hood.


maybe some kind of chebyshev wave-shaping filter?

#9 grymmjack

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Posted 04 February 2012 - 08:02

maybe some kind of chebyshev wave-shaping filter?


Jonas, I've been playing with engineers filter from rsmet, and I do see some interesting shapes there, I'll take a look at that further. Thanks for the help.
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#10 Dr. Drips

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Posted 04 February 2012 - 10:51

Was this the first filter that was lousy>got removed>back by dope demand?
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#11 Bitordaros

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Posted 04 February 2012 - 15:36

rsmet engineers filter is a beast, what a shame it can't be automated. : (

Edited by Bitordaros, 04 February 2012 - 15:37.


#12 grymmjack

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Posted 04 February 2012 - 19:58

rsmet engineers filter is a beast, what a shame it can't be automated. : (


I know man. But it's really really great for experiments and sound design. All of his plugins are very well made. Maybe we could give him a nudge and ask for EF2 :)
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#13 migloJE

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Posted 08 January 2017 - 13:56

What happened to scream filter, it was a must have tool for some of my drum and noise synthesis inside renoise..

 

And renoise team why you always are disabling some good features?  I still have installed early renoise versions for that reason.

 

If you don't want to show them i the effect panel make a hide button for them but dont disable them as they still active when loading old tracks anyway..



#14 EatMe

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Posted 09 January 2017 - 00:31

http://forum.renoise...ffect/?p=329102

 

This tool allows you to add hidden/legacy renoise DSP effects from previous versions of Renoise.


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#15 gentleclockdivider

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Posted 09 January 2017 - 01:02

Scream filter is old filter 2 and a rectifier ( absolute value ) behind it .

It takes about ten mouseclicks to recreate in reaktor .

Or take any other filter and ad a rectify module ...oh yeah renoise doesn't have math  modules ..


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#16 migloJE

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Posted 09 January 2017 - 13:21

Scream filter is old filter 2 and a rectifier ( absolute value ) behind it .

It takes about ten mouseclicks to recreate in reaktor .

Or take any other filter and ad a rectify module ...oh yeah renoise doesn't have math  modules ..

You think buying expencive software to replicate simple filter is the answer... :) I will go with the utility tool, the main question is why hide filters when they are still active for the backwards compatibility...


Edited by migloJE, 09 January 2017 - 13:38.


#17 OopsIFly

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Posted 09 January 2017 - 14:09

rectifier? Try the distortion device in "shift" mode. dunno why they called it "shift" and not "rect" which would be more logical



#18 TheBellows

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Posted 09 January 2017 - 17:09

Rectifier? Why would you need to rectify audio, wouldn't it just turn into DC? 

 

Honestly i never got anything useful out of the scream filter, i can't remember using it at all actually.



#19 OopsIFly

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Posted 09 January 2017 - 17:41

Rectification is a cool distortion. It shifts a sine wave one octave up, and generates lots of even order harmonics. That's why the rectifier in renoise's distortion module is named "shift". Of course rectification creates dc offset, so there needs to be compensation, like with a dc trap hipass filter and an adapting offset - the renoise rectifier does that automatically. I'm pretty sure you've already used it, without knowing its a rectifier because it has a different name. Put a reso filter before the shift distortion, and you have kind of a sound like the old scream filter.

 

Yes, the scream filter sound is kind of "special". I don't like it either, and imo unfiltered rectification is in the "thing is severely broken" kind of soundscapes realm. But I use the shift distortion, in combination with parallel processing and post filtering and so it can create cool timbres.



#20 TheBellows

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Posted 09 January 2017 - 19:10

Ok, i was thinking of rectifying as in electronics where you rectify a signal by using diodes to force it in one direction, in other words into a DC signal. Seems quite different from the rectifying you are talking about. Seems a bit weird to call something like that a rectifier imo, i don't understand how that can rectify, as in the meaning of the word, anything at all? 

 

Yes i use the shift distortion quite often. I like for instance a sine wave with a shift distortion followed by a fold distortion and filter at the end. Modulate the filter for a wobbling bass.



#21 gentleclockdivider

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Posted 09 January 2017 - 21:17

Rectifier? Why would you need to rectify audio, wouldn't it just turn into DC? 

 

Honestly i never got anything useful out of the scream filter, i can't remember using it at all actually.

Well like I said , the scream filter is a low pass filter+res and a rectifier after it ...a bit of gentle highpass filtering to roll of the low end ( dc offset .) 2 hZ is enough 

Why , because I recreated an exact copy in  reaktor .

34qr3v5.jpg


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#22 gentleclockdivider

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Posted 09 January 2017 - 21:28

34qr3v5.jpg

Sound example of reaktor primary /renoise scream filter 

https://app.box.com/...9yi6vtso1gf5itx


You think buying expencive software to replicate simple filter is the answer... :) I will go with the utility tool, the main question is why hide filters when they are still active for the backwards compatibility...

The utility tool won't do it , because you'l need to process each sample iow .. @ audio rate .

Yes , I have been asking for a formula device that processes at audio rate for ages .

And yes , I have bought reaktor .8 years ago for a verry nice price 150 euro , which is not much considering it costed around 450 .

You can get it now for 200 ..GO for it 

 

You can recreate scream  

Low pass filter + distortion module set to shift ( no changes made )


Edited by gentleclockdivider, 09 January 2017 - 21:48.

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#23 gentleclockdivider

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Posted 09 January 2017 - 21:34

Ok, i was thinking of rectifying as in electronics where you rectify a signal by using diodes to force it in one direction, in other words into a DC signal. Seems quite different from the rectifying you are talking about. Seems a bit weird to call something like that a rectifier imo, i don't understand how that can rectify, as in the meaning of the word, anything at all? 

 

Yes i use the shift distortion quite often. I like for instance a sine wave with a shift distortion followed by a fold distortion and filter at the end. Modulate the filter for a wobbling bass.

Exactly , rectifying is not just adding a constant offset , it is in fact mirroring the negative phase upwards-->  positive  .

If you'll look at the screenshot you'll see that the negative portion of the saw wave is flipped , it becomes a triangle with positive energy only , the ripples are because of the resonance .

Some verry mild hp filtering to get rid of dc offset,  a log value of 2 is about 5 hz ( out of my head ) .

 

Do the following test , draw a saw wave and select the distortion module ( don't change anything ) , set to shift and look at the osciloscope ...what do you see/hear  ....?

A triangle wave ( witth a spike in the middle ) , the shift algoritm is also using a rectifier .

 

Now add a low pass filter before the distortion  it ..et voila 

 

Scream filter = low pass filter  + distortion in shift mode .

 

Problem solved ..

Thread can be closed 

 

:)

25qx7pz.jpg


Edited by gentleclockdivider, 09 January 2017 - 21:46.

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#24 toblerpone

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Posted 10 January 2017 - 03:48

@thebellows: It's rectifying because a diode bridge rectifier without a smoothing capacitor would be used for this effect with electronics, with a high pass pass filter after to get rid of the resulting DC offset.

Bridge-Rectifier-Input-Output-Waveforms.


Edited by toblerpone, 10 January 2017 - 03:52.


#25 migloJE

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Posted 07 February 2017 - 19:25

Exactly , rectifying is not just adding a constant offset , it is in fact mirroring the negative phase upwards-->  positive  .

If you'll look at the screenshot you'll see that the negative portion of the saw wave is flipped , it becomes a triangle with positive energy only , the ripples are because of the resonance .

Some verry mild hp filtering to get rid of dc offset,  a log value of 2 is about 5 hz ( out of my head ) .

 

Do the following test , draw a saw wave and select the distortion module ( don't change anything ) , set to shift and look at the osciloscope ...what do you see/hear  ....?

A triangle wave ( witth a spike in the middle ) , the shift algoritm is also using a rectifier .

 

Now add a low pass filter before the distortion  it ..et voila 

 

Scream filter = low pass filter  + distortion in shift mode .

 

Problem solved ..

Thread can be closed 

 

:)

25qx7pz.jpg

 

 

Thanks for the hint, will test if it works for my drum synthesis and some other instruments i made using sream filter..