A wah-pedal is a guitar effects device that sweeps the center frequency of a bandpass filter using a foot-operated control (typically a potentiometer linked to a spring-loaded rocker), producing a vowel-like timbral sweep. Parameters: filter bandwidth (Q), sweep range, foot-spring tension, input/output gain. Persists as a physical stompbox unit, a circuit topology, and a playing technique taught in guitar pedagogy. [formal: wah-pedal | substrate: behavior | horizon: a moment | explicit: yes | epoch: 0.01]
Accepted ontology entry
wah-pedal
A wah-pedal is a guitar effects device that sweeps the center frequency of a bandpass filter using a foot-operated control (typically a potentiometer linked to a spring-loaded rocker), producing a vowel-like timbral sweep. Parameters: filt…
Definition
Why it is in scope
A wah-pedal is a human-made guitar effects device that sweeps a filter's center frequency via a foot-operated control (typically a potentiometer), producing a vocal-like tonal shift. Built to persist as a hardware pedal design, a signal-processing concept, and a guitar technique taught across generations of players.
Names and aliases
- wah-pedalen · CANONICAL
Relations from this entry
- cmsq9slb70091qqqlwldnh5bwDEPENDS_ON →
Removal test against the entry's own accepted definition (Laws 8a/8b): a wah-pedal operates by sweeping the center frequency of a band-pass filter via foot-operated control; remove the band-pass-filter construct and the device has no operating mechanism — no resonant center frequency to sweep, no 'wah' possible (a plain passive box is not a wah-pedal). The band-pass filter is the functional principle the pedal needs to operate, not its identity (the pedal is the device, not the filter) and not its purpose. Pinned sense: the filter as the device's resonant sweep mechanism. Parallel to the accepted wah-wah→band-pass-filter rung for the technique; this is the device-side of the same mechanism.
- wah-wahDERIVED_FROM →
Which-came-first (Law 7): wah-wah is the technique of sweeping a bandpass filter center frequency to produce a vocal-like sound. The wah-pedal is the stompbox device built to make the wah-wah technique practical. The technique predates the dedicated pedal device. Direction: wah-pedal (newer device) to wah-wah (older technique). Pinned sense: wah-wah as the filter-sweeping technique.
- cmsp49ekv0413jlssad11emypDEPENDS_ON →
A wah pedal operates by routing audio through a band-pass filter whose center frequency is controlled by a foot pedal. Remove filter and the wah pedal has no mechanism — it IS a filter with a specific control interface. The which-came-first test passes: filter (epoch 0.17) predates wah-pedal (epoch 0.26).
- audio-effectINSTANCE_OF →
Wah-pedal is a specific kind of audio effect: it intentionally alters a guitar signal by sweeping a bandpass filter's center frequency, producing a distinctive timbral change. A competent audio engineer would call a wah-pedal an audio effect. Nearest kind per Law 11e: audio-effect (between wah-pedal and the broader signal-processing). Direction: specific→general per Law 9.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Sep 7, 2026, 8:29 AM UTC
- Content hash
- 5ae30537b1cc38a0e7489577cb9f6c57b23bbc478232841edd5c6a37c5cad573