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Linear and minimum phase

A never-ending debate is that of linear versus minimum phase filters with proponents of each often deriding the other as unnatural or even unlistenable. We explore the meaning of these terms and how the differences can impact an audio signal.

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Filter ringing

There exists a widespread belief that digital low-pass filters introduce an audible ringing effect when applied to music. We investigate the phenomenon.

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UHQCD

Over the years, various enhancements to the CD format have been marketed with promises of higher sound quality through the use of superior materials. One of the more recent entrants is UHQCD. We examine the performance of a CD player while playing such a disc.