Boss TW-1 T-Wah / Touch Wah


  • Sens
    Controls how the effect responds to the input signal.
  • Peak
    Controls the amplitude of the .
  • Drive (Down/Up)
    Selects the direction of the filter sweep: down- or upwards.


This effect was first called T-Wah, then Touch Wah and again T-Wah.

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