The present invention relates generally to a device and method for inserting and retaining an acoustical damper in a sound port for in-ear monitoring systems. This invention further discloses a process for improving mechanical properties of PPS. The remote computer system has a remote host embedded controller interface driver and a HECI simulator. Numerous other aspects are provided. The control gate power supply is coupled to the control gate for providing a gradually increasing gate voltage to the control gate to control the source current flowing through the memory cell and adjust the threshold voltage of the memory cells.