At the risk of sounding like a n00b, I post this: I was searching on eBay for an auto wah pedal for the bass. What I found was a 'dynamic filter'. It had the word 'auto wah' in its title but i think this was just to get hits. Can anyone tell me the difference? The pedal was a Boss FT-2. I'm afraid to say that the bidding is over for this pedal but I am willing to buy one somewhere else. What is this pedal?