Plantronics has discontinued the audio management graphic equalizer software, PerSono. This product was integrated and shipped with a number of our DSP entertainment products in the past. The new line of Plantronics DSP entertainment headsets for the PC are not compatible with the legacy PerSono (Audio Control Centre) application. For questions on the use of the PerSono application and for those customers interested in obtaining a version of PerSono for use with headsets that support it please contact our customer support or you may download the software from our website.