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How to link BP Filters in a series?

VST, AU, etc. plug-in Virtual Effects discussion

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iamDennis
KVRer
 
8 posts since 26 Jan, 2014

Postby iamDennis; Thu Jul 03, 2014 3:22 pm How to link BP Filters in a series?

Trying to do some formants, how would one go about linking some bandpass filters in a series?

Thx :hug:
-Dennis
V-GER
KVRian
 
569 posts since 2 Oct, 2011

Postby V-GER; Thu Jul 03, 2014 3:44 pm Re: How to link BP Filters in a series?

You need them parallell, not in series. The easiest way would probably be to use a filter plugin that allready has two filters and lets you choose between parallell and serial configurations, for instance Cableguys Filtershaper 3. If you want more than 2 BPFs you need something more advanced, like for instance a modular synth that lets process external audio. If you want to understand technically how this works and have a high level of controll over certain details in the sound or you're just a fairly processoriented guy this is the way to go. If it's just the sound you're after and you're more resultoriented you may rather want a plugin that allready has "instant" formant filters.

Generally you need to modulate the frequencies if you work with "just" 2 BPFs while with 3 or more the right static frequencies can give you some nice formants. Either way it can take some effort to get it right, especially the first couple of times.

Convoluted workaround for 3 BPFs: route your sound to 3 separate instances of a BPF plugin, making sure none of the dry sound is heard. They each need to be on a separate channel/bus, then tweak to taste or as whatever data on formants you may have available tells you to. This can be pretty cumbersome, there's issues of how wide the cutoff, the actual frequencies and db for each BPF. Add to this the mysterious discrepancy between theory and practice and you may be in for a very frustrating experience.

Also the more harmonically complex the sound the filters has to work with the likelier to get a good result, sometimes you may want to use some distortion on the soundsource fed to the filters to add some harmonics.
"Well, I haven't tried anything yet. I need to research solutions
first."
User avatar
ZenPunkHippy
KVRAF
 
10365 posts since 18 Jun, 2008, from Melbourne, Australia

Postby ZenPunkHippy; Thu Jul 03, 2014 3:46 pm Re: How to link BP Filters in a series?

FabFilter Volcano is quite nice for formant filter effects since it can run up to 4 filters in parallel.

This is a great resource for learning about formant synthesis + filtering, with a list of useful frequencies:

http://www.soundonsound.com/sos/mar01/a ... nthsec.asp

Peace,
Andy.
iamDennis
KVRer
 
8 posts since 26 Jan, 2014

Postby iamDennis; Thu Jul 03, 2014 4:11 pm Re: How to link BP Filters in a series?

Thanks for the info guys.

Modulating between different formants is gonna be a pain in the ass though, probably going to use volcano to make it easy.

And yea I tried a couple filters with the "instant" formants, Sugar Bytes WOW and Tone2 Bifilter, but they're kinda soft, don't bring out the formants just enough. I even tired stacking them to bring the formants out even further, but that adds quite a bit of extra resonance.

I'll have to look into the cableguys filter as well, can't believe I missed that one.

I'll also try using NI Reaktor, I bet you could sync as many filters as you want with the map editor.

Anyways thanks, appreciate the quick response.
-Dennis
camsr
KVRAF
 
4589 posts since 16 Feb, 2005

Postby camsr; Fri Jul 04, 2014 3:48 am Re: How to link BP Filters in a series?

Formant filters are just the basic EQ with the filters tuned like how the vowels sound.
Image
V-GER
KVRian
 
569 posts since 2 Oct, 2011

Postby V-GER; Fri Jul 04, 2014 4:08 am Re: How to link BP Filters in a series?

Oh, almost forgot u-he Filterscape. A 4-band EQ with 8 morphable snapshots should be perfect to morph smoothly between different formant settings.
"Well, I haven't tried anything yet. I need to research solutions
first."
iamDennis
KVRer
 
8 posts since 26 Jan, 2014

Postby iamDennis; Fri Jul 04, 2014 8:32 am Re: How to link BP Filters in a series?

V-GER wrote:Oh, almost forgot u-he Filterscape. A 4-band EQ with 8 morphable snapshots should be perfect to morph smoothly between different formant settings.


This is fantastic. The morph wheel is awesome, lfo's have phase, a pitch and breath wheel and a step sequencer? This is by far the most features I have ever seen on an eq/filter. Thanks for sharing, u-he doesn't disappoint. :tu:

If only it showed the frequency in hz.... :dog:
VariKusBrainZ
KVRAF
 
3615 posts since 16 Dec, 2002, from over there

Postby VariKusBrainZ; Sat Jul 05, 2014 11:48 pm Re: How to link BP Filters in a series?

As usual, Image Line are ahead of the game by years ;)

"EQUO is an advanced morphing graphic equalizer plugin".
I can also analyse and match a signal

https://www.image-line.com/support/FLHe ... s/EQUO.htm
realmarco
Waaaaahhh
 
1375 posts since 29 Jul, 2001, from montreal, quebec,canada

Postby realmarco; Fri Jul 18, 2014 9:07 am Re: How to link BP Filters in a series?

iamDennis wrote:Trying to do some formants, how would one go about linking some bandpass filters in a series?

Thx :hug:
-Dennis



formants as in to make words or just the A U I EE stuff ?

check these out
http://www.kvraudio.com/q.php?search=1& ... +filter&ty
If your plugin is a Synth-edit/synth-maker creation, Say So.
If not Make a Mac version of your Plugins Please.

https://soundcloud.com/realmarco

...everyone is out to get me!!!!!!!

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