This Kuassa Efektor Bass Bundle: Cruncher Bass Tube Preamp, Driver Bass Preamp, and Bass Smasher Distortion provide a full spectrum of distorted bass tones. This is downloadable software that can run on Mac or PC. Modeled on tube amplifiers, these digital plug-ins feature a simple interface with a resizable window that works within your VST/VST3/AU/AAX compatible DAW. This Efektor bundle adds tonal variation to bass guitar as well as any low-frequency instrument.