Gearsix

crossover for multiband compressor
« on: January 17, 2021, 01:13:33 AM »
Hello to all.
Can someone help me with a good 3 way crossover schematic for a multiband compressor use?



abbey road d enfer

Re: crossover for multiband compressor
« Reply #1 on: January 17, 2021, 03:11:56 AM »
Hello to all.
Can someone help me with a good 3 way crossover schematic for a multiband compressor use?
What slope? What kind of linearity are you expecting for the recconstructed signal? What about phase response?
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Gearsix

Re: crossover for multiband compressor
« Reply #2 on: January 17, 2021, 06:39:01 AM »
I read that 6 db slope should be a good value

What I need is a circuit where to connect different compressors from time to time
Something like the Drawmer Three Sum, even simpler

analogguru

Re: crossover for multiband compressor
« Reply #3 on: January 17, 2021, 08:19:20 AM »
Aphex 700 Studio Dominator comes to my mind.

Gearsix

Re: crossover for multiband compressor
« Reply #4 on: January 17, 2021, 08:28:03 AM »
Thank you, but Aphex 700 seems to be a complete mutliband limiter

analogguru

Re: crossover for multiband compressor
« Reply #5 on: January 17, 2021, 10:04:05 AM »
But you can take only the filter section from it.... 3-band, 6db/ocktave, subtractive.  what do you want else ?
« Last Edit: January 17, 2021, 10:07:15 AM by analogguru »

JohnRoberts

Re: crossover for multiband compressor
« Reply #6 on: January 17, 2021, 11:06:21 AM »
Hello to all.
Can someone help me with a good 3 way crossover schematic for a multiband compressor use?
Crossover for the side chain or primary audio path?

Traditionally de-essers/de-poppers, only band split in the side chain to selectively emphasize or de-emphasize different frequencies. For this manipulation the filter transfer functions and re-combining properties are not that important, since the audio path integrity remains intact.

For frequency dividing in the main audio path, combining back together does matter. If I was considering such a design (and I never did) I would consider a a subtractive crossover filter, that sums back to unity without phase funnies. To get 3 pass bands would require cascading two subtractive filters in series. These subtractive filters don't deliver steep slopes but allow you to put Humpty back together. I would probably first try to see what I could accomplish just manipulating the side chain.

for TMI back during the FM radio loudness wars, station engineers implemented multi-band compression using conventional loudspeaker crossovers of the day with the different bandpass outputs fed into separate channels of compressors. The music got louder but was sometimes unrecognizable compared to the original recordings.     

JR
It's nice to be nice....

Re: crossover for multiband compressor
« Reply #7 on: January 17, 2021, 01:54:53 PM »
« Last Edit: January 17, 2021, 02:31:12 PM by Strawtles »

Gearsix

Re: crossover for multiband compressor New
« Reply #8 on: January 18, 2021, 05:20:16 AM »
Great, I think it is the one I am searching for!
With two switches, changing the resistors value, I can select different frequencies. It's right?
« Last Edit: January 19, 2021, 02:48:48 AM by Gearsix »

 

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