Adding a Wah Pedal

A wah pedal (or wah-wah, or CryBaby pedal) operates by sweeping a single resonance through the spectrum. The resonance is conventionally second-order.

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Subsections

• Digitizing the CryBaby
  • Choice of Wah Filter Structure
  • Measuring the CryBaby Frequency Response
  • Notes regarding the matlab script in Fig.D.21:
  • Notes regarding invfreqsmethod listing in Fig.D.22:
  • The Digital CryBaby in Faust
  • Conclusions Regarding the Digital CryBaby
  
  
• Wah Pedal Based on the Moog VCF
  • Faust Implementation
  
  
• A 2D Male Vowel Pedal
• Special Case: A ``YoYo'' Pedal
• Special Case: An ``All Vowels'' Pedal

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Order a Hardcopy of Physical Audio Signal Processing

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Next: Digitizing the CryBaby

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written by Julius Orion Smith III
Julius Smith's background is in electrical engineering (BS Rice 1975, PhD Stanford 1983). He is presently Professor of Music and Associate Professor (by courtesy) of Electrical Engineering at Stanford's Center for Computer Research in Music and Acoustics (CCRMA), teaching courses and pursuing research related to signal processing applied to music and audio systems. See http://ccrma.stanford.edu/~jos/ for details.