Patch Idea 22: Audio-Rate Envelope

Turn the sequencer off, DRONE mode, PITCH MOD fader lowered, the envelope cycling. XY into RATE raises the envelope's speed into audio range; HOLD goes to INPUT (or to the filter MOD). Listen to the patterns that emerge as the ENV and PULSE rates both reach audio range.

Source: Softpop SP2 manual (Bastl Instruments), Patch Ideas, page 42.