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Author Topic: Parallel compression, my new love & best friend  (Read 50724 times)

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Offline Sloan Simpson

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Re: Parallel compression, my new love & best friend
« Reply #30 on: August 31, 2010, 04:26:34 PM »
The old light-bulb went off in my head and this all makes sense now, thanks to everyone!

Offline live2496

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Re: Parallel compression, my new love & best friend
« Reply #31 on: September 01, 2010, 10:28:04 AM »
I saw this technique being used live by someone recording classical music for a venue. They make recordings of every performance and there was no time for post processing as one-off CD's had to be created for the conductor nightly.

A compressed stereo pair was mixed in with the uncompressed signal and this was mixed on the fly to a CD recorder. The compressed tracks make the average RMS level higher for very soft passages that are harder to hear especially if you are listening in a noisier environment . They were not just recording the compressed audio but a blend of compressed and uncompressed signals.

When I work on recordings that I have made myself there is usually some parallel processing of some kind. Sometimes this can be separate eq to mid and side signals and sometimes the original track is blended in with mid-side signals. I might even compress the mid a bit and leave the sides alone. It depends upon the recording.
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Offline Massive Dynamic

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Re: Parallel compression, my new love & best friend
« Reply #32 on: September 02, 2010, 09:32:15 PM »
I haven't tried this yet, but it sounds interesting. All this work should be done on a copy of a 24-bit master before dithering/resampling down to redbook, correct?
Also, I've sometimes wondered about putting a compressor, something like the FMR RNC, in the recording chain. Of course, results would be irreversible. Maybe this processing technique would accomplish the same thing?
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Re: Parallel compression, my new love & best friend
« Reply #33 on: September 02, 2010, 09:48:13 PM »
I haven't tried this yet, but it sounds interesting. All this work should be done on a copy of a 24-bit master before dithering/resampling down to redbook, correct?

well before yes.

In some ways I'd almost do:

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Offline live2496

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Re: Parallel compression, my new love & best friend
« Reply #34 on: September 02, 2010, 10:03:44 PM »
I haven't tried this yet, but it sounds interesting. All this work should be done on a copy of a 24-bit master before dithering/resampling down to redbook, correct?
Also, I've sometimes wondered about putting a compressor, something like the FMR RNC, in the recording chain. Of course, results would be irreversible. Maybe this processing technique would accomplish the same thing?

The main reason to do this with something like an outboard compressor is if you have to produce a mix in realtime. Given a choice I would prefer to work in software as it offers more control and the ability to undo.
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Offline yates7592

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Re: Parallel compression, my new love & best friend
« Reply #35 on: September 06, 2010, 06:00:47 AM »
Many thanks for this really helpful thread. I'd never used this method before.

I must admit the prospect of using 2 files, EQ-ing, compressing and mixing did fill me with horror, so i tried a potentially simpler way. I used the 'upward compression' preset in Waves C1 compressor plug-in on one of my concert recordings with very quiet and very loud passages. I played around with the threshold until i got about 4dB-6dB of gain on the quiet passages and the result was really impressive. It really brought life and body to the whole recording without loss of dynamics.

I'm not sure this is exactly the same as what has been described, but it does follow the same principle of upward compression, and is extremely easy to implement by novices like me as a plug-in effect.

Offline rjp

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Re: Parallel compression, my new love & best friend
« Reply #36 on: October 02, 2010, 01:25:41 AM »
I decided to give one of my classical recordings (a binaural recording of an a cappella chorale) the parallel compression treatment tonight. Even though I felt a bit squicked about applying compression to a live recording, the result was very pleasing. It sounded as if I had moved up right up to the front row! Details that seemed slightly hazy in the original leaped into clarity, and the remastered version has a lot more punch to it without seeming to lose the dynamics. Of course, to be pedantic, it does lose some dynamic range, but this is not the sort of Death Magnetic-style brickwalling that I hate. All in all, it was well worth the fiddling (and yes, this is a fiddly process - it took a lot of fiddling to keep the compressor from pumping).

In Audacity, I came up with -13 dB threshold, -45 dB noise floor, 6.5:1 compression ratio, 0.2 sec attack time, and 10 sec decay time for the compressed track, and then I set the compressed track -5 dB below the uncompressed track. Then, I knocked back the gain on both tracks until there was no more clipping at the peaks, and mixed them together.

I'm going to have to try this on some of my other pulls now...
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Re: Parallel compression, my new love & best friend
« Reply #37 on: October 07, 2010, 11:10:22 PM »
.
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Re: Parallel compression, my new love & best friend
« Reply #38 on: October 07, 2010, 11:36:34 PM »

BTW another common name for this technique is New York Compression.


^This is what I've heard it referred as when I was taught it. Nashville engineers will know it as parallel compression. Apparently since recording space is limited in NY, engineers would do this to make the tracks more in your face and seem like they were recorded in much larger rooms.
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Offline bdasilva

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Re: Parallel compression, my new love & best friend
« Reply #39 on: October 08, 2010, 11:05:22 PM »
There is a name for it....?   I run mostly matrixs and  was digging (compressing) my soundboard channel looking for vocals. I found it and so I mixed this back in....  Along with the uncompressed signal. That was the sound.  Thanks for naming and explaining this so well.
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Offline goodcooker

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Re: Parallel compression, my new love & best friend
« Reply #40 on: October 26, 2010, 12:43:09 AM »
When running matrices I was digging (compressing) my soundboard channel looking for vocals

and fiddle and acoustic...this technique works great for compressing a board feed and mixing with an uncompressed audience source.
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Re: Parallel compression, my new love & best friend
« Reply #41 on: December 14, 2010, 04:46:39 PM »
When running matrices I was digging (compressing) my soundboard channel looking for vocals

and fiddle and acoustic...this technique works great for compressing a board feed and mixing with an uncompressed audience source.
 


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Offline beatkilla

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Re: Parallel compression, my new love & best friend
« Reply #42 on: December 16, 2010, 04:45:02 PM »
Trying this out and i get phasing what am i doing wrong?

Offline beatkilla

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Re: Parallel compression, my new love & best friend
« Reply #43 on: December 17, 2010, 10:18:20 AM »
Any suggestions for a better compressor,im looking for free VST plug in.Currently i have sony track compressor,classic compressor and gcomp.

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Re: Parallel compression, my new love & best friend
« Reply #44 on: December 17, 2010, 10:34:54 AM »
Haven't tried it myself, but I've heard good reports about the transparency of the free Weldroid Courvoisier recently. I'm sure there are a number of others worth considering.
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