I had some time last night to just play bass & mandolin--and decided to use some pedals. Mostly I used my Boss AW-3 Dynamic Wah--a type of Auto Wah. So no pedal to wah back & forth--although if I had an expression pedal I could use it as one with this pedal. On some settings the harder you play the more it wahs. And there's the voice-ish setting where you can set it for different vowels. it's cool--some sounds have a real growl to them, some are very smooth. I originally bought it thinking to use it on guitar, but as it has a separate bass input I tried it on my old bass, and had a lot of fun with it--I enjoy more on bass than guitar--but the pedal works great for both. I decided that if I'd had a pedal like that when I was younger I would have played bass more often. Another way this ties in with bass,is that earlier this year I decided I would write & eventually record a song that was inspired by each instrument I have. Other instruments can appear in the song & can even play a lead role, but the song had to be inspired by that instrument. I also grandfathered a couple of riffs I already was working on turning into songs. So I had some ideas on my fretless (Ibanez SR500F), but trying them with the AW-3 made one idea come alive--I really liked it without effects, but it sounds even better with some Wah. I haven't recorded it yet, but I'm working out the song order and then what to play with it on guitar & maybe mandolin. So the pedal is inspiring some creativity and it's fun to use. just thought I'd share--to encourage other bass players here, and in case you care.. Thanks.