Wah-Wah ( “wah-wah” , “bulmashka” , “bulumacher”, “bulum” , “waha” ) is a sound effect that allows you to dynamically change the timbre.
Working Principle
In essence, the device is a parametric filter, in which the center frequency of the peak is changed with the help of a pedal. Often in one device combine "wow-wow" and distortion / overdrive. There are two main types of effect - with a pedal and avtovau. The first is controlled by the expression pedal, due to which the musician can change the sound non-cyclically, the second only changes the frequency according to the input signal level or with a given rhythm. There are models that combine these two effects. Pedal "wow-wow" is divided into constantly working and auto-shut down. The first performer himself turns on / off with a special button on the body, the second reacts to putting the foot on the pedal. There are bass guitars, but they are less common.
This effect will help make the guitar solo more expressive.
History
In 1965, while recording the album "Help!" "wow-wow" used by George Harrison . Popularized the effect of the famous guitarist Jimi Hendrix , for whom "wow-wow" was an integral element of the corporate sound. Kvakushka uses a large number of performers, for example - Jeff Beck , Richard Kruspe , Zack Wild , Kirk Lee Hammett , John Petrucci , Yngwie Malmsteen , Slash , Sergey Mavrin , Kenny Wayne Sheppard , Mick Box , Tom Morello , Michael Padget , Matthew Tak and many others. One of the first bass guitarists using the effect was Geezer Butler (in the NIB intro), later Cliff Burton used wah-wah in the intro of For Whom The Bell Tolls , as well as in (Anesthesia) Pulling Teeth . The main producers of "wow-wow" - Dunlop, Morley, Vox, Boss.