Great pedal that has a personality all it's own. Love love love it's smooth and velvety gorgeousness.
Threshold pretty much sets the start frequency of the filter. It sounds so sweet when set low as you can hear.
Attack knob lets you set how much wah at the start.
Sounds great with bass too as you'll hear in the next post.
My simple setup here is:
83 MIJ Squier bullet>MXR Envelope Filter>Soundworks 4 channel PA 100w
Recorded with Kodak V570 cam.