Effect 3: Auto Filter

Plug an external audio source into INPUT and bring up the INPUT fader. Effect set-up from the manual: DRONE mode, LP filter, minimal resonance, CUTOFF fader all the way up. Play with the filter faders for different filtering that follows the input; use BP for wah-type sounds.

Source: Softpop SP2 manual (Bastl Instruments), Effect Patch Ideas, page 43.