This plugin makes sure that your headphones are brought to a 'standard' level so that wherever you might listen to your projects, they will sound the same, no distortion, no added bass, no low volume. Otherwise, you might notice that the piece you just produced sounds different on each audio system, which is not an ideal situation. When producing music, it is very important that your audio output system is calibrated. Sonarworks Reference 3 Headphones Calibration is a collection of plugins that can be deployed directly to your DAW (Digital Audio Workstation) of choice in order to calibrate your favorite headphones.