[icecast] automatic gain control

sublime at mac.com sublime at mac.com
Wed Nov 14 16:40:06 UTC 2001



the ACG function that the compressor provides is limited at best. its
adjustment is way too audible to make full use of it in balancing levels.
yes, it is last in the chain. i'm just wondering if there's anything out
there in the way of software. if a minidisc recorder can do it, why can't a
$1000 pc?

-p

> From: "William Goldsmith" <wildbill at kpig.com>
> Reply-To: icecast at xiph.org
> Date: Wed, 14 Nov 2001 08:36:36 -0800
> To: <icecast at xiph.org>
> Subject: Re: [icecast] automatic gain control
> 
> From what you describe, your comp/limiter can't possibly be working
> correctly. It should be the last unit in line before the sound card, and
> needs to be adjusted properly. You also need to balance the levels on your
> mixing board (so that the correc t level comes at predictable place on the
> slider). It might be worthwhile to find someone with some sound-mixing or
> radio engineering experience to help you out. Sounds like you're missing
> some very basic stuff.
> 
> Software dynamics processing is more involved than you might think. And
> you'd be trying to use software to solve what is basically a hardware/user
> problem.
> 
> Furman also makes total crap. You'd be much better off with one of the newer
> Behringer units. Cheap but very functional. Though that doesn't negate the
> need to take care of the basics mentioned above.
> 
> -bg
> www.radioparadise.com
> www.kpig.com
> 
> 
> 
>> we're actually using a furman c/l already, but the levels coming into the
>> mixer are still all over the place. one mp3 might be much louder than
>> another, the phone interface is way too loud, the dj mic is too quiet,
> etc.
>> usually one of the planners ends up sitting by and adjusting the igain in
>> aumix. is there any software-based solution? it seems like it wouldn't be
>> all that hard to implement.
>> 
>> -p
>> 
>>> From: Reuben Martin <Reuben at FishB8.dns2go.com>
>>> Reply-To: icecast at xiph.org
>>> Date: Wed, 14 Nov 2001 09:41:14 -0600
>>> To: icecast at xiph.org
>>> Cc: pharkawik at hampshire.edu
>>> Subject: Re: [icecast] automatic gain control
>>> 
>>>> we have a web-based station running liveice and aumix and the levels
> are all
>>>> over the place. is there a way to do automatic gain control on the
> soundcard
>>>> input?
>>>> 
>>>> -peter
>>> 
>>> 
>>> Run the signal through a Compressor/Limiter before sending it to your
>>> soundcard. I use Behringer Ultra-Dyne Pro DSP9024. Very nice. If you
>>> want to buy it look here:
>>> http://www.zzounds.com/love.music?p=p.BEHDSP9024&z=1221177312792
>>> 
>>> 
>>> -Reuben
>>> 
>>> 
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