Audio Effects
Andrés Cabrera
MAT 200B
Types of effects
- Spectral effects
- Dynamic range effects
- Time delay effects and Reverb
- Others
Spectral Effects
- Filters
- Effects in the frequency domain
- Non-linear effects (e.g. distortion)
- Phase vocoder
Filters
- Filters change the spectrum of a sound
- They don't (in theory) add anything, they just adjust what is already there.
- Uses:
- Adjust "color"
- Fix small problems
- Extreme effects
- Improve interaction with other elements in a mix
Audio Filters
Low cut/High pass
High cut/Low pass
- Cutoff
- Slope
Parametric EQ
- Center freq, Bandwidth/Q, Gain
Cross-over filters
Graphic Equalizer
Often found in sound reinforcement and for studio acoustics correction
Shelf filters
Resonant filters
Additional resonance parameter
Non-linear effects
Distortion
Spectral processing
(in the frequency domain)
Phase Vocoder
Dynamic range processing
Compression/Expansion
Noise gate
Only level is changed, but it is changed dynamically according to the signal's (or sometimes another's) own level
Compression
Compression
Usual Parameters:
Threshold, Compression Ratio, Attack time, Release time
Compressor knee
Uses of compression
- Reduce dynamic range
- Avoid spurious peaks
- Reduce transients
- Emphasize transients
- Homogenize level
Expansion/Gating
Audio Effects
By mantaraya36
