This simple vibrato adds a tremolo effect to any electronically amplified musical instrument. In other terms the vibrato or tremolo makes the sound to fluctuate at a very low frequency. These fluctuations adds a new dimension of the music. These device have their greatest uses with Guitars and accordions.
The term called ENVOLOPE is one of the very important factor for the emitted sound characteristic of the GUITAR or a particular musical instrument. It relates to the way of a musical note rises to its peak amplitude with respect to its time and maintain its value. The beginning period is called ATTACK and the retaining period is called SUSTAIN.