stereo automatic gain controller.

[pal]

Since i am trying to use the G2 engine as a kind of mastering tool...
I would like to find out if its possible to make some kind of stereo automatic gain controller.

Wich means that incomming audio wil alwayse be gained to the level wanted.. so when incomming audio of song 1 is louder or softer then song 2, al the songs being played thrue the G2 wil come out with the same loudness..

The difficult is when a song is very soft and the g2 patch has to put more gain automaticly...is this possible?


This machine will do the job but i dont want more machines....
http://www.symetrixaudio.com/forums.html?Show=14&Show1=&Show2=260

[deknow]

there is no automatic way to make 2 differant pieces of program material to have the same percieved loudness....this is what ears are for. a limiter or normalizer is possible, but this does not insure that they will "sound" the same level.

deknow

[elektro80]

deknow is correct about this. Matching the percieved loudness between audio files is damned hard and this itself is not something you would trust a compressor/limiter or an agc to do for you. That said, you can use these tools in order to achieve this, but then you would also have to make the hard choices yourself.

Theoretically it is possibly to construct a "machine" that can do this fairly well, but we would be then speaking of some pretty serious hardware. There would still be problems though, and such a box would really be nothing better than a "smarter" helper. You would still have to judge the results and make the choices yourself.

[illuminated]

Edited

[Kassen]

I suppose a very slow compressor with a huge lookahead (that gets flushed inbetween songs) and a loudness curve made with a static multiband eq in the sidechain might get somewhat close.

The big question is; why would you want to do this and if you must, why would you automate it? Also; if you insist on doing this and on automating it, why in the G2? If you would succeed in acomplishing this without damagining the relative levels between passages in the same song then you'll have to use two passes for each song; one for analysis and one to actually create the effect. If this is going to work at all it will probably be the most complex G2 patch in existance.

How about this; create a patch with a compressor, a limiter, stereo enhancer (carefull there!) and some eq. Take one song as the reference and manually A-B the rest to it, trying to get close to that. Strive for coherence and a narative arch over all the tracks instead of for uniformity.

[mosc]

Compressors in FM radio stations do a pretty good job of this. Personally, I'd rather build my own compressor using the G2 than use something that someone else figured sounds good. I guess the point is, if you want something that will sound good to you, you'll have to work at. No surprise.

[ian-s]