Jan 12, 2007· Information, pictures and reviews of the Akai Variwah W1. The Veriwah gives you a pedal wah and a touch wah in one unit. In Touch Wah mode, the threshold can be adjusted with the Touch Sensitivity knob, Attack Time adjusts speed of response, and Offset changes the range of wah filter movement. The pedal can be assigned to control depth, speed, threshold level and offset.