Compressor/Sustainer

Compressors reduce the dynamic range of the signal.   For the guitar or bass, compression helps even out the sound variations that occur naturaly when playing.  Additionally, it increased the natural guitar signal so that it decays less rapidly, resulting in greater sustain.   You can tweak the compressor to set the point where compression occurs as well as how much compression occurs (compression ratio).  A compressor is an essential studio and stage tool to enhance your sound.