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Downloadable computer software for manipulating digital audio information for use in audio media applications; Downloadable computer software to control and improve computer and audio equipment sound quality; Downloadable computer software to enhance the audio-visual capabilities of multimedia applications, namely, for the integration of text, audio, graphics, still images and moving pictures; Computer-controlled apparatus for testing and measuring audio signal and room acoustics; Consumer electronic products, namely, power conversion devices, power converters, and power inverters; Downloadable software to control and improve audio equipment sound quality