[linux-audio-user] LADSPA hints

Paul Winkler pw_lists at slinkp.com
Sun May 22 19:24:31 EDT 2005


On Sun, May 22, 2005 at 10:34:30PM +0100, tim hall wrote:
> I want to use SC4 to essentially 'flatten out' a vocal take. I know such 
> approaches are generally frowned on around here, 

are they?

> but the take has a large 
> dynamic range and it simply won't sit right in the mix any other way. I'm 
> really not sure where to put the threshold and compression ration to achieve 
> this kind of effect and I could do with some guidelines on attack, decay and 
> knee settings. It's a pop song, and yes I really do want it to sound like 
> that. any ideas?

Sure, here's what I do. 
Start with the compression ratio around 4-5 (that's plenty - it may
be more than you need but that helps you dial in the other controls). 
You won't actually hear any compression until you turn down the threshold 
level, so do that now.  Gradually turn it it down until you start hearing 
(and seeing on the meter) some gain reduction whenever the voice 
is actually singing.  When you like the sound, add some makeup gain
until the overall level is good.

The default attack/release settings are maybe slow for vocals, so I turn
them down a bit - attack to about 20, release to about 150.

So far I have not needed to tweak the "knee" parameter.

For my own stuff I don't tend to like really obvious compression except 
as an occasional deliberate effect. So once I've got a sound I like, 
I then tend to reduce the compression ratio gradually until I think it could
maybe use a little more, and at that point I leave it alone :-)
Maybe come back to it later and see if I still like it.

But if I'm trying to sound like pop radio, I might go the other
way and set the compression ratio to something severe like 10:1.
 
There's some good guidelines to be found all over the net...
http://www.alesis.com/support/faqs/masterlink_comp_app.html
http://www.digido.com/portal/pmodule_id=11/pmdmode=fullscreen/pageadder_page_id=51/


-- 

Paul Winkler
http://www.slinkp.com



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