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Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
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Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency - June 2013
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New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
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Second Generation Intelligent Class D Amplifier Controller Integrated Circuit Enables both Low Cost and High Performance Amplifier Designs

This paper describes a digital input Class D amplifier controller integrated circuit which performs many of the functions needed to build a high performance Class D audio amplifier. Sophisticated digital Pulse Width Modulation, combined with digital feed-forward and feedback paths, yields both low cost and high performance amplifier designs. A powerful DSP is included to support amplifier control and allows comprehensive audio signal processing, including loudspeaker load compensation, EQ, time alignment, room acoustics compensation, bass enhancement, loudspeaker driver protection, virtual surround and other audio signal processing tasks. Power supply feed-forward and closed-loop feedback technology correct for power supply variations, non-linearity and other distortion-inducing mechanisms.

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