Subtract frequencies from A to B?

Euklid.fox · Post by **Euklid.fox** » Sun Dec 14, 2008 3:21 pm

Is there a way to subtract (in real time) frequencies that hit in a track A, to a track B?
ie:
the classical use of basic comp sidechain is to lower the bass/pad when the kick is hitting,
I dl'ike to dynamically Eq instead of amp compression...this way It would lower only the low freq on the bass/pad when kick is still there, not lower the whole spectrum, then release the low freq when kick is'nt there anymore.

(kind of frequency sidechain subtract)

If I m not wrong this would be a perfect tool for mixing, would allow to never have overlapping frequencies...

so any thought it is possible??

Machinate · Post by **Machinate** » Sun Dec 14, 2008 4:22 pm

I'd just sidechain some Auto Filters.

timbreland · Post by **timbreland** » Sun Dec 14, 2008 4:41 pm

related:
http://forum.ableton.com/viewtopic.php?t=100704

Euklid.fox · Post by **Euklid.fox** » Sun Dec 14, 2008 8:37 pm

well thank you machinate, but it's actually what I do and I d like to go a bit deeper, more thin band Eq than large filter bands, also need to "detect" what are the frequencies over time, not an "overall" band....

djsynchro · Post by **djsynchro** » Sun Dec 14, 2008 8:45 pm

write EQ automation.

timothyallan · Post by **timothyallan** » Sun Dec 14, 2008 9:03 pm

map two EQs on different channels to the same midi controller knob, then invert the range on one.

But then it's not automatic

rbmonosylabik · Post by **rbmonosylabik** » Mon Dec 15, 2008 5:45 am

set up an EQ crossover with 2 EQ8s in a rack in different chains, then add the sidechain comp to the lows chain.

djgroovy · Post by **djgroovy** » Mon Dec 15, 2008 7:13 pm

rbmonosylabik wrote:set up an EQ crossover with 2 EQ8s in a rack in different chains, then add the sidechain comp to the lows chain.

+1

ethios4 · Post by **ethios4** » Mon Dec 15, 2008 7:44 pm

I made a sweepable crossover with exactly this in mind.

http://forum.ableton.com/viewtopic.php?t=48922

The crossover is mathematically perfect, with Henke's help, so the crossover is completely transparent. Ideally this would be multi-band, but it works well for bass.

morerecords · Post by **morerecords** » Mon Dec 15, 2008 10:36 pm

blue cat audio plug ins for mac and pc too

Euklid.fox · Post by **Euklid.fox** » Mon Dec 15, 2008 10:56 pm

ok thank you gys for recommandations, but all I see here are still limited to one or two band,(the crossover(that is cool, i already got

technique will so be only one band) ideally I would need realtime invert equing, but that might be enough after all...

automating Eq is a solution but I ideally would like it to perform "LIVE".

I was wondering the benefits (I already use kind of crossover tek)
cause if the kick is a pitched down "sin" wave, and I d like to "invert Eq" the bass/pad that is playing at the same time, then the bass track would first be lowered only in the mids, then in low mids, then low end, the crossover tech doesn't allow such precise time variation equing... I thought about a combinaison of this tech and a sidechain filter, or someone suggested me to automat Eq with cc received from an envelloppe folower, wich seems to be the most accurate solution, but quite boring /cpu hog to setup,

just finding somehow it's strange such automatik sidechain invert Eq doesn't already exist in VST, maybe too much CPU hog....

morerecords wrote:blue cat audio plug ins for mac and pc too

I thought the Digital peak meter could help me a lot with what i want to do but unfortunately live can't receive midi data from an audio track... or did you found a workaround?
but thanks anyway

Grappadura · Post by **Grappadura** » Mon Dec 15, 2008 11:34 pm

Using eq 3 for that can be really sexy.