The Transform Sustain Pedal To Duration option extends the length of all notes that are sounding when the sustain pedal (controller 64) is down (64 to 127) to the point when the sustain pedal goes up (0 to 63). Enable the Delete Sustain Pedal Events option to convert sustain pedal events to note durations. Converting sustain pedal events to note duration can greatly simplify editing while maintaining the desired performance effect. For example, if a sustain pedal down event is deleted while editing, the subsequent MIDI performance loses its legato effect.