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Subtractive Filtering?
Posted: Sun Jan 22, 2012 3:57 am
by 2beats
I am wondering what is the easiest and clearest way to take one sound source and use it to eq another. Basically I have some white noise that I want to eq out the frequencies of my melody as an experiment. How would I do that?
I know about side chaining but that is more of a ducking thing and doesn't equally imprint the eq across all frequencies, or can it? I only use it for sidechain compression.
Any ideas?
Re: Subtractive Filtering?
Posted: Sun Jan 22, 2012 4:37 am
by agent314
Vocoder?
Re: Subtractive Filtering?
Posted: Sun Jan 22, 2012 11:55 am
by oddstep
I think the easiest way would be to use your ears and apply eq cuts to one track based on a b comparisons with the other. I might use the multiband compressor's bandkill/solo function to make it easier to hear whats going on in a given hertz range. You could make some kind of spectral compressor rack... Split the input into a number of freq ranges and side chain them against the same range on the key track (using the live compressor's rudimentary filter). . Taking that idea further you could create separate tracks for frequency range input and use bandpass filters to really shape the key input. Its quite a maxpatch sort of job really.
Re: Subtractive Filtering?
Posted: Sun Jan 22, 2012 12:02 pm
by oddstep
I also think there's a significant chance that it is a idea that sounds better on paper than it does in reality. No reason not to try it though. I remember when I reinvented 3 4 time through a hours of work making a polyrhythmic arpeggiator in max.

Re: Subtractive Filtering?
Posted: Sun Jan 22, 2012 12:05 pm
by crumhorn
agent314 wrote:Vocoder?
this + phase cancelling ?
Re: Subtractive Filtering?
Posted: Sun Jan 22, 2012 12:16 pm
by octopod
If you have Logic you could try this trick with its Match EQ
http://www.logicprohelp.com/forum/viewtopic.php?t=36790
Re: Subtractive Filtering?
Posted: Sun Jan 22, 2012 6:46 pm
by Vios
I think you could try multi-band sidechain compression. Ie, use an audio effect rack that uses 3 instances eq 8 or multiband dynamics to divide your audio into the lows, the mids, and the highs. Then you could add a compressor to one of the 3 instances with sidechain enabled cued to your other track. You could even use the EQ built into Ableton's compressor such that when the highs come in on the other track you compress your lows (don't know why you'd want to do this though).
I don't really know why you'd want to do this. I think use of good sounding samples with proper eq/compression trumps weird effects every time, but I'm pretty traditional when it comes to music production.