Drawmer ADX 100 User's Guide download pdf (Page 19)

User’s Guide

Compressor/Limiter

Compressor

A compressor is

traditionally used to fit a

large signal into a small

space, especially in a

situation where the dynamic range of the original audio signal is

larger than the electronic reproduction equipment will accept

(broadcast engineers appreciate this very much). Compression

might also be thought of as being one of the most important

tools used in both recording and mixing.

Automatic gain makeup is active at all times. This adjusts the

compressor output level to compensate for the amount of gain

reduction. This reduces the need to readjust the compressor gain

after changing ratio, threshold, or knee settings.

Limiter

Limiting is basically extreme compression. The limiter is set to

affect only signals above a certain level. This is particularly

useful for limiting peaks that would otherwise send the signal

beyond the capacity of the equipment being used. Limiting has

become very popular when using a digital recorder because

peaking a digital signal sounds like a car wreck. When used in

this fashion, thresholds are set at around –2 db to prevent the

signal from clipping.

1:1

2:1

No Compression

Compression

Limiting Threshold

Input Signal Level

Threshold

Level

Active Button

The compressor and limiter have their own Active buttons. The

compressor Active button (when off) routes the input signal

directly to the limiter, with no processing or gain.

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Drawmer ADX 100 User's Guide Page 19