Filters (Envelope) Envelope Filters, Wah Wahs and others. These alter the tone, timbre or shape of your guitar sound. Anderton Bi-Filter Boss Slow Gear DOD 440 EF Dr. Quack (EHX Doctor Q) Maestro Filter Sample/Hold Musitronics Mu-tron III (Neutron) Musitronics Mu-tron Micro V MXR Envelope Filter Roland Funny Cat
