
Use the Ringshifter envelope follower in MainStage
The oscillator Frequency and Dry/Wet parameters can be modulated with the internal envelope follower—and the LFO (see Use the Ringshifter LFO). The oscillator frequency even allows modulation through the 0 Hz point, thus changing the oscillation direction.
The envelope follower analyzes the amplitude (volume) of the input signal to create a continuously changing control signal—a dynamic volume envelope of the input signal. This control signal can be used for modulation purposes.

Envelope Follower parameters
Power button: Turn the envelope follower on or off. When it is turned on, you can access the following parameters.
Sensitivity slider and field: Determine how responsive the envelope follower is to the input signal. At lower settings, the envelope follower reacts only to the most dominant signal peaks. At higher settings, the envelope follower tracks the signal more closely but may react less dynamically.
Attack slider and field: Set the response time of the envelope follower.
Decay slider and field: Set the time it takes the envelope follower to return from a higher to a lower value.