I was interested in the sound of a flanger on bass, especially a fretless. I didn't have the money, nor did I want to max out my MusiciansFried Platinum card . I ended up buying one of the most inexpensive pedals they had, a Rocktek Flanger, total cost $39.99. It got here yesterday while I was at work, so I got to play around with it today before I had to leave. For $40, I was surprised with the quality of the sound. It's input is for geetar, bass, and keyboard, where I was thinking it might have only been for geetar. The effect kinda gets lost on the low notes, (F down through low B) but not completely. All in all, well worth the $40.