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→Pre vs. Post Placement
''Auto-Wah'' is simply wah pedal circuitry attached to an LFO, generating a constant wah-wah sweep. It is used to get wah movement that is generally faster and more rhythmically consistent than you'd want to produce manually with a traditional wah pedal.
== Pre vs. Post Signal Chain Placement ==
Modulation effects do not have a typical placement like most other effects. They are often placed before the amp (pre) as well as in the effects loop (post).