ludwing
Joined: 28 May 2003
Posts: 2
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| Compression What the F** is it? questions |
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Hello all, I'm new to this, however, I have a question that might sound stupid, but i always wondered.
The formula of Dynamic range being a logarithmic expresion of 2 parameters, resulting in dB. When looking at any software compressor graphs I notice negative dB in the axis OUT/IN. Why are these Db negative numbers?
does it mean attenuation? standarization? what's the acoustic meaning of the 0 dB point?
Thank you |
Wed May 28, 2003 5:36 pm |
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AUdIoCoUrSeS
Joined: 31 Oct 2002
Posts: 2014
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| Reference Levels |
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Ludwing
This is basically about reference levels.
Alll studios operate at a reference level, so compatibility exists between them and the equipment. If you look at a mixing desk the operating level (best place for optimum performance) is 0dB.
0db is usually referenced to 0.775 volts. Therefore, +6dB is 1.4 volts (there about) and -6dB is about 350 milli volts. (there about).
The graphs on the compressor are merely indicated like everything else in the studio.
More info about referecne levels and meters here:
http://www.audiocourses.com/modules.php?name=Forums&file=viewtopic&t=386&highlight=0dbu+calibration
Does that help?
Chrish |
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Wed May 28, 2003 6:32 pm |
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ludwing
Joined: 28 May 2003
Posts: 2
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| simple definition |
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Thanks for answering Chriss. Yes, it helps, somehow I forgot that simple definition.
regards,
_________________
Ludwing Diaz
Technology Engineer |
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Wed May 28, 2003 6:42 pm |
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