Abstract: An apparatus for producing a corona discharge and a method for producing a corona discharge is described. The apparatus comprises a voltage controlled oscillator (VCO) for producing an audio signal at an adjustable frequency. The VCO is controlled by a ramp generator, and the ramp generator causes the voltage controlled oscillator to continually adjust the frequency of the audio signal. The audio signal modulates a carrier signal produced by a pulse width modulated oscillator and the modulated carrier signal is provided to a coil assembly. The coil assembly is matched to the frequency of the carrier signal and produces a high voltage AC charge from the audio signal. A discharge pin discharges the high voltage AC charge in the form of an ionized corona from the coil assembly.