Behringer Bass Synthesizer Bsy600 Ultimate Bass Synthesizer Effects Pedal The ultimate bass synthesizer that reproduces the fat and powerful sound of classic analog synthesizersat the touch of a footswitch Real Sound Modeling (RSM) combines state-of-the-art DSP technology with sophisticated algorithms to emulate real acoustic environments Take off with 11 cutting Saw, Square and Pulse synth waveforms, Control filter cutoff and LFO rate via expression pedal (not included) Dedicated Mode, Decay/Rate, Resonance, Direct, Effect and Frequency controls for awesome sound shaping Blue status LED for effect on/off and battery check