I'm looking for a volume pedal, but I'm sort of stumped. Many pedals describe that they are for either a passive or active instrument, some say nothing about that at all, but none say they're for both. My question is, does it matter, and if so why? I play a G&L L-2000, which is active and passive, as well as occasionally playing my friend's Fender Jazz (passive). So I need one that handles both. Also, what's the difference between an audio and a linear pot? Most have audio, but the Morley (Little Alligator) has a linear. This is the one I'm thinking about getting, so if you have any comments, I'd appreciate that as well. Thanks for any help!