FILTERS

Sep 11, 2007 at 5:17am

FILTERS

Ive never been totally happy with any of the built in max filters. Ive made a few algorithms for the biquad, and had medium success. Ive studied as much as I can with wiki and the net. Searched maxobjects.com and got everything I can find, and Im still not entirely happy. Does anyone know of a truely great SVF or 2/4 pole filter? I don’t get why the resonance of filtercoeff+biquad seems to sound a bit annoying sometimes no matter how I tune it, it just isn’t as nice as most digital/analogue synths Ive heard.

I would love any info!

#33632
Sep 11, 2007 at 6:53am

On 11 Sep 2007, at 07:17, Nicholas C. Raftis III wrote:

> Does anyone know of a truely great SVF or 2/4 pole filter?

i like 2up_svf~ by randy jones, but surely you have already tried
that one.
vb

#112236
Sep 11, 2007 at 7:58am

#112237
Sep 11, 2007 at 9:52am

yes, same with me, got a little bit frustrated with the standard filters and the control abilities. i did a port of the moogvcf from musicdsp.org which sounds nice and is easy to control, it’s itself a port of the csound moog filter and also available in supercollider. if you want the code or the java classes, let me know. at the moment i am trying to rebuild the diode ladder filter from reaktor, but it will still take some time.

if anyone has some good resources for filters (code?) i would also be interested…

micha

#112238
Sep 11, 2007 at 9:56am

#112239
Sep 11, 2007 at 3:36pm

2up_svf~ is mac only, does anyone know of a good
alternative for XP?

#112240
Sep 11, 2007 at 3:46pm

micha,

a while ago, i met a fellow (german) maxer in the uk who developed an object called b4ladder~ which was (AFAIK) an emulation of the moog ladder filter. unfortunately the maxobjects.com link is broken (http://maxobjects.com/?v=objects&id_objet=2566&requested=b4ladder~&operateur=AND&id_plateforme=0).

but you could try getting in touch to see if he is willing to share some of his resources / or code. his website is: http://www.block4.com/

meanwhile any chance you could share your moogvcf as an external?

;)

hth,

j

Quote: micha wrote on Tue, 11 September 2007 10:52
—————————————————-
> yes, same with me, got a little bit frustrated with the standard filters and the control abilities. i did a port of the moogvcf from musicdsp.org which sounds nice and is easy to control, it’s itself a port of the csound moog filter and also available in supercollider. if you want the code or the java classes, let me know. at the moment i am trying to rebuild the diode ladder filter from reaktor, but it will still take some time.
>
> if anyone has some good resources for filters (code?) i would also be interested…
>
> micha
—————————————————-

#112241
Sep 11, 2007 at 3:57pm

anthony, i did a port of it some month ago and you can get the xp 2up_svf from my “site”.

see:

http://www.khm.de/~mthies

#112242
Sep 11, 2007 at 4:11pm

#112243
Sep 11, 2007 at 4:14pm

thanks for the info with block4, i will mail the developer, maybe i can make a xp port, if he is willing to share the sources.

> meanwhile any chance you could share your moogvcf as an external?

i attached an older version as source and compiled java class including a help patch. everything is (only) signal controled, with frequency going from 0-1 and resonance from 0-~3.99. these values are updated every sample.

be carefull, if the filter blows up, there is no way to reset it. i did a rework and a couple of variations of it, but these are at the moment not really ready to work on any other computer than mine. if i find some time in the next days i will finish them and let you know.

btw, the diode ladder was easier to finish than i thought and sounds really nice, i try to pack this in too.

micha

#112244
Sep 11, 2007 at 4:18pm

awesome, I will check it out.

Anthony

—– Original Message —–
From: micha
Date: Tuesday, September 11, 2007 11:03 am
Subject: [maxmsp] Re: FILTERS

>
> anthony, i did a port of it some month ago and you can get the xp
> 2up_svf from my “site”.
>
> see:
>
> http://www.khm.de/~mthies
>

#112245
Sep 11, 2007 at 5:32pm

Thanks for this Micha – but am getting a “deltaclick~ not found”
error – and don’t see an object like that listed on maxobjects.com??

Dan

At 6:14 PM +0200 9/11/07, micha wrote:
>i attached an older version as source and compiled java class
>including a help patch. everything is (only) signal controled, with
>frequency going from 0-1 and resonance from 0-~3.99. these values
>are updated every sample.


Dan Nigrin
Defective Records
202 Hack / PC-1600 User / VSTi Host / OMS Convert / Jack OS X / Major
Malfunction
http://www.defectiverecords.com

http://www.jackosx.com

#112246
Sep 11, 2007 at 6:02pm

ahhh sorry, that’s only for the demonstration, you can substitute it by:

[delta~]->[< ~ 0.5]

so that’s:

#P window setfont “Sans Serif” 12.;
#P window linecount 1;
#P comment 58 35 66 9109516 deltaclick~;
#B frgb 91 194 255;
#P outlet 19 93 15 0;
#N comlet;
#P inlet 19 17 15 0;
#P window setfont “Sans Serif” 9.;
#P newex 19 67 37 9109513 < ~ -0.5;
#P newex 19 42 33 9109513 delta~;
#P comment 58 53 152 9109513 detect when a phasor wraps phase;
#P connect 2 0 4 0;
#P connect 1 0 2 0;
#P connect 3 0 1 0;
#P window clipboard copycount 6;

#112247
Sep 11, 2007 at 6:35pm

At 8:02 PM +0200 9/11/07, micha wrote:
>ahhh sorry, that’s only for the demonstration, you can substitute it by:

Got it – nice filter!

Thanks for the source too – nice for guys like me who think this
stuff is impossible to build, but then to see in reality how
straightforward it is…. (if you know what you’re doing!)

Dan

Dan Nigrin
Defective Records
202 Hack / PC-1600 User / VSTi Host / OMS Convert / Jack OS X / Major
Malfunction
http://www.defectiverecords.com

http://www.jackosx.com

#112248
Sep 11, 2007 at 7:44pm

ups, must correct myself:

[delta~]->[< ~ -0.5]

in the patch it is of course right.

#112249
Sep 11, 2007 at 9:00pm

#112250
Sep 11, 2007 at 10:16pm

#112251
Sep 12, 2007 at 1:04am

After posting this late last night I did a comparison of the 2up svf and the max svf with astonishing results, 2up has insanely better response, is self oscillating at full 1.0 res, much cleaner and not as harsh, and it says in the help that its made from the same algo as the max one but double precision and “tweaked for musicality” well its just what I needed, but I would love to have more other flavors too. I would love to try out this moog ladder filter, Ill download that later tonight. Good work guys!

#112252
Sep 12, 2007 at 9:06am

#112253
Sep 12, 2007 at 9:07am

nice work, look forward to hearing the ladder filter!
BTW the person i mentioned in my previous post is doing some Linux audio dev – so he should be up for sharing code! ;)

j

Quote: micha wrote on Tue, 11 September 2007 17:14
—————————————————-
> thanks for the info with block4, i will mail the developer, maybe i can make a xp port, if he is willing to share the sources.
>
> > meanwhile any chance you could share your moogvcf as an external?
>
> i attached an older version as source and compiled java class including a help patch. everything is (only) signal controled, with frequency going from 0-1 and resonance from 0-~3.99. these values are updated every sample.
>
> be carefull, if the filter blows up, there is no way to reset it. i did a rework and a couple of variations of it, but these are at the moment not really ready to work on any other computer than mine. if i find some time in the next days i will finish them and let you know.
>
> btw, the diode ladder was easier to finish than i thought and sounds really nice, i try to pack this in too.
>
> micha
—————————————————-

#112254
Sep 12, 2007 at 11:43am

i seem to have some problem installing 2up_svf~ on OSX. i moved the
2up_svf~.mxo to my externals folder, and the help file to the max-help folder. should i move something else?

on initiating an instance i get a message

? error: 2up_svf~: unable to load object bundle executable
2007-09-12 12:30:36.036 MaxMSP[658] CFLog (21): dyld returns 2 when trying to load /Applications/MaxMSP 4.6/Cycling ’74/externals/3rd party externals/2up_svf~.mxo/Contents/MacOS/2up_svf~

#112255
Sep 12, 2007 at 12:53pm

bin, you running mathats strange, Im using an intel, are you on PPC?

#112256
Sep 12, 2007 at 1:10pm

i am running PPC

#112257
Sep 12, 2007 at 1:42pm

Indeed — I know this too! :-)

We’re working on a solution; hopefully not too far away…

brad

http://music.columbia.edu/~brad

Quoting “f.e”

:

> Yeah, hopefully i already know that, Jean-Michel. But sitting on
> a board
> which i know will break, even after 99999 seconds, stress me too
> much.
>
> f.e

#112258
Sep 12, 2007 at 7:26pm

Thanks for the feedback! Add “warm” and “punchy” and I’ve got a
sales brochure.

Someone had a problem with the object on PPC which I think I’ve
fixed. Update at http://2uptech.com , as always.

-Randy

On Sep 11, 2007, at 6:04 PM, Nicholas C. Raftis III wrote:
> After posting this late last night I did a comparison of the 2up
> svf and the max svf with astonishing results, 2up has insanely
> better response, is self oscillating at full 1.0 res, much cleaner
> and not as harsh, and it says in the help that its made from the
> same algo as the max one but double precision and “tweaked for
> musicality” well its just what I needed, but I would love to have
> more other flavors too. I would love to try out this moog ladder
> filter, Ill download that later tonight. Good work guys!
> –

#112259
Sep 16, 2007 at 10:30am

#112260
Sep 17, 2007 at 10:04am

#112261
Jan 26, 2008 at 11:12am

Hi Randy,

What was the problem ? I doing an external and face the same issue, so your fix solution can help a lot…

Thanks !

Salvator

#112262
Jan 26, 2008 at 11:13am

#112263
Jan 27, 2008 at 1:00pm

On 26 Jan 2008, at 12:13, Salvator wrote:

>
> Hi Randy,
>
> What was the problem ? I doing an external and face the same issue,
> so your fix solution can help a lot…
>

if i remember well, i think it was simply that the object wasn’t
compiled for both architechtures, but only for i386.
changing the build settings in the xcode project to i386/pcc and
recompiling fixed the problem for me at that time.

vb

#112264

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