Distortion Learning LabA-Level Music Technology
Interactive visual learning tool for understanding audio distortion concepts
Hard Clipping
"Sharp, aggressive cutoff creating predominantly odd harmonics. The signal is abruptly cut when it exceeds the threshold."
More details & examples
Characteristics:
- Transistor circuits
- Digital clipping
- Aggressive tone
- Odd harmonics (3rd, 5th, 7th)
Technical Detail:
Implements a brick-wall limiter that clips any signal exceeding ±threshold. Creates a near-square wave at high gain.
Common Genres:
Metal, Punk, Hard Rock, Industrial
Professional Plugins:
Pro Tools Clip, FabFilter Saturn (Hard), Soundtoys Decapitator
Ableton Live:
Saturator (Digital Clip)
Historical Note: First heard in the 1960s when guitarists began deliberately overdriving their amplifiers.
Soft Clipping
"Gradual saturation with smoother harmonic content. The signal is progressively compressed as it approaches the threshold."
More details & examples
Characteristics:
- Overdrive pedals
- Analog tape
- Warm compression
- Smoother harmonics
Technical Detail:
Uses a hyperbolic tangent or similar curve to gradually reduce gain as signal increases. Preserves more of the original dynamics.
Common Genres:
Blues, Classic Rock, Jazz Fusion, Country
Professional Plugins:
Waves Abbey Road Saturator, UAD Studer, Soundtoys Decapitator
Ableton Live:
Saturator (Soft Sine) / Glue Compressor (Clip)
Historical Note: The sound of analog tape saturation that defined recordings from the 1960s-1990s.
Tube Saturation
"Asymmetric warmth emphasising even-order harmonics. Positive and negative peaks are processed differently."
More details & examples
Characteristics:
- Valve amplifiers
- Asymmetric response
- Even harmonics (2nd, 4th, 6th)
- Musical warmth
Technical Detail:
Asymmetric transfer function where positive peaks are compressed more than negative. This asymmetry creates even-order harmonics perceived as "warm".
Common Genres:
Rock, Blues, Jazz, Vintage recordings
Professional Plugins:
Waves PuigTec, UAD Neve, Softube Tube-Tech
Ableton Live:
Dynamic Tube / Amp (Clean)
Historical Note: The valve/tube amplifier sound that has defined "warmth" in audio since the 1950s.
Fuzz
"Extreme clipping approaching square wave. Creates dense harmonic content and heavy compression."
More details & examples
Characteristics:
- Square wave tendency
- Extreme harmonics
- Sustain
- Thick texture
Technical Detail:
Very low threshold with aggressive clipping creates near-square waves. The original waveform is almost completely replaced by a new, harmonically rich signal.
Common Genres:
Psychedelic Rock, Stoner Rock, Garage, Alternative
Professional Plugins:
Waves GTR Fuzz, Native Instruments Guitar Rig, Soundtoys Devil-Loc
Ableton Live:
Overdrive / Pedal (Fuzz)
Historical Note: Accidentally discovered in the 1960s through damaged equipment - Jimi Hendrix made it famous.
Quick Reference Guide
Symmetrical Clipping
Positive and negative peaks processed equally → Odd harmonics
Examples: Hard clip, Soft clip
Asymmetrical Distortion
Peaks processed differently → Even harmonics
Examples: Tube saturation
THD Formula
THD = √(H₂² + H₃² + ... + Hₙ²) / H₁
Ratio of harmonics to fundamental
Distortion Learning Lab • A-Level Music Technology Component 4 • Visual learning tool (no audio playback)