Why to use a looper?

An electric guitar is a source of very high impedance (from 75 kOhm to 150 kOhm) comparing to other devices like dynamic microphone or keyboard instrument (less than 1 kOhm). To not drive under or change the guitar signal, the guitar cable should have the lowest possible parasitic capacitance and the amp or other device connected to the guitar should have high input impedance. Typical tube amps’ input impedance is the level of 1 MOhm. Very often the guitar pedal effects’ input impedance is much lower and majority of them even switched off by their main switch still affect guitar signal. It can affect lower amplitude of the signal, change of the generated sound and noise generation or distortions. The influence depends on electronic circuits applied in the particular effect and the most reliable method to eliminate it is to skip effects not used currently. The idea of a effects loops switcher (looper) is coming from this need. Loopers can be grouped into 2 groups: simple (each loop has got its own switch) and programmable (for each switch are programmed effects loops which should be active). Programmable effects switches give possibility to quickly access to the programmed preset (pressing just one footswitch). The GSC offers dual mode of working: using presets footswitches can be selected programmed set of active effects and then used effects can be simply controlled.