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Last Updated: 20060803, mei

Friday, October 6, 9:00 am — 12:00 pm


Stanley Lipshitz, University of Waterloo - Waterloo, Ontario, Canada
John Vanderkooy, University of Waterloo - Waterloo, Ontario, Canada

This is an introductory-level tutorial aiming to explain and demonstrate with "live" examples the two fundamental aspects of any digital audio system—sampling and quantization. These two operations will be discussed and illustrated in real-time using a custom-built sampler and quantizer. This will enable us to present some of the pathologies of such systems, which should not normally be audible, and also show that, when properly implemented, a digital system has analog characteristics. This will make the presentation interesting to newcomers and "old pros" alike.

Topics to be covered will include:
— Sampling only (without quantization)
— Sampling artifacts (aliases and images)
— Reconstruction
— Quantization only (without sampling)
— Quantization errors
— Dither

The demonstrations will enable the audience to hear and see what is going on, both good and bad.

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