Audio Class: The Tools
Limiting, Compression
& Expansion
Limiting
- Limits high
level excursions
- Makes up for
uncontrolled or sloppy level control
- Found on most
camcorders & VCRs
- Avoid limiting
music, especially on camcorders
- Dolby is
frequency-dependent limiting
Compression
- Raises low
levels and cuts high levels
- Fits wide
dynamic range program into limited channel
Expansion
- Expands
(de-compresses) compressed audio
- Usually
symmetrical (used with matching compressor) like
Dolby or DBX.
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Audio Class ©
1993 Richard Crowley