sidechain dynamic EQ?

lukasbrooklyn · 23rd October 2005, 10:01 PM

i've had this idea in my had for some time and i thought i'd inquire to you about it.

i've been contemplating about a plugin (process) that would analyze the harmonic peaks of one signal, and apply that information dynamically on another signal. in essence, this would be like an 'advanced' sidechain compression, that would work with harmonic peaks instead of overall volume. so in essence, something like a sidechain dynamic EQ. i'm suspecting a vocoder does something along these lines, but i'm not entirely sure...

hope this makes any sense.

anyone could shed some light on what i'm describing?

thank you.

-lukas

Mike O · 24th October 2005, 01:12 AM

This does not appear to be exactly what you are describing but might provide you some ideas. As a side note to others interested in hardware, I have heard (but not heard myself) that the first version is better, but no longer made.

JonCraig · 24th October 2005, 03:37 AM

by "harmonic peaks" do you mean upper-freq harmonics of a given signal? or just you want the plugin/box/whatever to respond to peak information rather than rms?

if you are talking about upper harmonics, you want, as those harmonics rise above a threshold, that to trigger compression on another channel?

if you just mean peak detection rather than rms, i would think you just want a fast compressor. plugins should be capable of this (think the digital limiter-type, with lookahead). that would be easy enough to just send off the detection chan to a buss that is assigned to the sidechain input of the compressor on the chan you want to compress.

what am i overlooking?

--jon

lukasbrooklyn · 24th October 2005, 09:15 AM

sorry if i weren't too clear: with peaks i meant ANY peaks in the spectrum. that is, not volume peaks. a vocoder does exactly that, what i was thinking about would be something like an inverted vocoding process. the general idea is for a creative tool that would make two audio signals 'interplay': when a spectral peak occurs in one signal, the same freq band would be dynamically turned down in the other signal, and vice versa. it's just an idea i'm carrying in my head...

Empty Planet · 24th October 2005, 04:34 PM

Here are two people working with similar ideas -- not exactly the same, but they're working with the ideas and they'll certainly be knowledgable in coding techniques which will be of interest.

Check out "Clone Boy" and "Space Boy" here.

http://www.elevayta.com/service.htm

And this one is a great dynamic eq.

http://www.platinumears.com/IQ4gui.zip

...discussed here.

http://www.kvraudio.com/forum/viewto...iq4+gui#934623

Cheers.

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23rd October 2005, 10:01 PM	#1
lukasbrooklyn Gear nut Join Date: Jan 2005 Location: prague, czech rep. Posts: 94	sidechain dynamic EQ? i've had this idea in my had for some time and i thought i'd inquire to you about it. i've been contemplating about a plugin (process) that would analyze the harmonic peaks of one signal, and apply that information dynamically on another signal. in essence, this would be like an 'advanced' sidechain compression, that would work with harmonic peaks instead of overall volume. so in essence, something like a sidechain dynamic EQ. i'm suspecting a vocoder does something along these lines, but i'm not entirely sure... hope this makes any sense. anyone could shed some light on what i'm describing? thank you. -lukas

24th October 2005, 03:37 AM	#3
JonCraig Lives for gear Join Date: Apr 2004 Location: Nashville, TN Posts: 1,801	by "harmonic peaks" do you mean upper-freq harmonics of a given signal? or just you want the plugin/box/whatever to respond to peak information rather than rms? if you are talking about upper harmonics, you want, as those harmonics rise above a threshold, that to trigger compression on another channel? if you just mean peak detection rather than rms, i would think you just want a fast compressor. plugins should be capable of this (think the digital limiter-type, with lookahead). that would be easy enough to just send off the detection chan to a buss that is assigned to the sidechain input of the compressor on the chan you want to compress. what am i overlooking? --jon __________________ "my job is to make music sound great and to not whine too much." --george massenburg Learn PT Techniques from Multi-Platinum Engineers. Click Me. Pro Tools "Tip of the Day" Widget. Click Me.

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24th October 2005, 01:12 AM	#2
Mike O Lives for gear Join Date: Jun 2002 Posts: 705	This does not appear to be exactly what you are describing but might provide you some ideas. As a side note to others interested in hardware, I have heard (but not heard myself) that the first version is better, but no longer made.

24th October 2005, 09:15 AM	#4
lukasbrooklyn Gear nut Join Date: Jan 2005 Location: prague, czech rep. Posts: 94	sorry if i weren't too clear: with peaks i meant ANY peaks in the spectrum. that is, not volume peaks. a vocoder does exactly that, what i was thinking about would be something like an inverted vocoding process. the general idea is for a creative tool that would make two audio signals 'interplay': when a spectral peak occurs in one signal, the same freq band would be dynamically turned down in the other signal, and vice versa. it's just an idea i'm carrying in my head...

24th October 2005, 04:34 PM	#5
Empty Planet Lives for gear Join Date: Nov 2003 Location: NYC Posts: 727	Here are two people working with similar ideas -- not exactly the same, but they're working with the ideas and they'll certainly be knowledgable in coding techniques which will be of interest. Check out "Clone Boy" and "Space Boy" here. http://www.elevayta.com/service.htm And this one is a great dynamic eq. http://www.platinumears.com/IQ4gui.zip ...discussed here. http://www.kvraudio.com/forum/viewto...iq4+gui#934623 Cheers.