The training typically involves the child attending two 30-minute sessions per day, separated by a minimum of three hours, for ten consecutive working days. The child listens via headphones to a program of specially filtered and modulated music with wide frequency range. The program is modified for each child with certain frequencies of sound filtered using an electronic device, which randomly switches between low- and high-pass filtering for random durations between 1/4 and 2 seconds. The filtering device also varies the sound's intensity, creating a modulated effect. The volume is set as loud as possible without causing discomfort. If the listener has shown unusual sensitivities to certain frequencies, these may be filtered out additionally.
