As a flexible dynamic effect, the Behringer CS400 Compressor/Sustainer is the perfect sound tool for electric guitar and electric bass. Accordingly, the handy effects pedal helps to smooth unwanted level peaks and amplify quiet notes, creating even dynamics for crisp finger-picking on the guitar or slaps on the bass. The Behringer CS400 also extends note sustain for almost endless singing drive sounds. The Sustain control of the Behringer CS400 Compressor/Sustainer controls the amount of compression, while the Attack pot determines how fast the compressor responds. In addition, the Behringer CS400 Compressor/Sustainer features a Tone control for precise adjustment of the signal's presence and treble content.