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RMAF11: Digital Jitter and Volume Controls, Martin Mallison, CTO, ESS Technology

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Uploaded on Feb 18, 2012

Martin's second shorter presentation covers two topics that commonly arise in audio electronics. 1. Why does an analog volume control out-perform a digital one, and will a digital one ever measure up? We will look at noise sources and how an analog volume control needs to be designed to outperform even the best digital volume controls. 2. Why is jitter such a problem in digital audio devices? Can jitter actually be removed? We will go into some detail and describe the optimum clocking scheme for an Audio DAC, which is to have the DAC clock be the system master clock. But how can this be done if data is being delivered in another clock domain? We will explain what an Asynchronous Sample Rate Converter does and how it can help solve the clocking problem.

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