portable guitar amplifier - with a host of facilities

portable guitar amplifier The controls for bass, mid-range, and high frequencies on most commercial guitar amplifiers may be compared with those on a hi-fi installation. Unfortunately, they do not change the basic character of the sounds produced by a guitar string: to do so, many more additional units are required: phaser, chorus, flanger, fuzz box, and so on. In many cases, these units really do mellow the harsh notes pro- duced by the guitar. The amplifier described here does not, and is not intended to, replace such additional units entirely. However, several of the add-on units are based on similar principles and can be imitated fairly easily, and well, by the voltage-controlled filter on which the design of the present amplifier is based. Mixing the outputs of a voltage-controlled filter (VCF) allows the continuous transition from all pass to notch mode. Furthermore, the signal from the integral fuzz circuit may be added to the outputs of the VCF, so that with only four pote...