The BOSS SYB-3 is a great bass effect. It uses 2 different sythesizers, a wave shape modifier, and an automatic T-wah (which kind of sucks). But the synth sounds are great. The saw wave synth is really cool (sounds like the synth used in Rush's "Tom Sawyer). And the wave shape mod. is a great metal/industrial effect. But by far the coolest effect you can get out of this pedal is to connect it to an overdrive and play the saw wave synth and overdrive at the same time. There is no other sound on this earth like it.