Recording

Mastering The Controls (1)

The Music Telegraph | Text 2019/05/29 [11:26]
Recording

Mastering The Controls (1)

The Music Telegraph| 입력 : 2019/05/29 [11:26]

▲ Compressor

 



Mastering The Controls (1)

 

1. Threshold

Determines the level at which processing kicks in. With compressors and limiters, signals that cross above the threshold level get processed; with expanders and gates, only signals below thethreshold get the treatment. 

To help in setting the threshold, better processors have a gain reduction meter. Simpler boxes may have an LED that illuminates whenever the input signal crosses the threshold.

 

2. Ratio

The ratio between a change in input level and the corresponding change in output.

 

3. Ratio Range

Ratio Range depends upon the job at hand. Compression calls for ratios of 2:1 to 10:1. Once you approach 8:1 or greater, audio begins to sound more than just a little "squashed".

 

4. Limiting

Limiting implies very high compression ratios: 10:1, 20:1 or even ∞:1. At these ratios, input level increases result in just tiny output level increases. For expanders, opposite ratios are the way to think: A 3:1 ratio setting on the box should really be thought of as a 1:3 setting, since a 1 dB drop in input level will be expanded to a 3 dB drop in output level (once the signal drops below threshold). Expansion ratios range from 1:2 to about 1:10.

 

5. Gate

Gate is like an extreme expander. Since gates are usually "open" or "closed", however, and not somewhere in between, their ratio is 1:∞. This means that once the input level drops below threshold, there is an infinite amount of gating. In other words, silence.

 

6. Attack and Release

The attack control determines how quickly processing kicks in once a signal has crossed threshold, from micor seconds to a second or longer. There are times when it's necessary to limit a signal instantly. A more moderate attack setting sounds better for processing an "average" of signals, rather than just peaks.

 

 

 

 

 

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