Home › Forums › Products › Stompboxes › Short Phrase Looping Techniques – Stompboxes › Reply To: Short Phrase Looping Techniques – Stompboxes October 24, 2014 at 11:37 pm #137500 brockParticipant Expression Pedal Heel: Feedback = 100% Expression Pedal Toe: Feedback = 0% Envelope-controlled up & down octave glides in phase-offset loops. Flex switch introduces pitch glides one octave higher. Expression pedal for decaying loops, deconstruction, and loop stop.