Jamie Angus: How to Do Audio Sampling, and Sample Rate Conversion, Properly!

AES Live: Expo - 140th Convention

Jamie Angus: How to Do Audio Sampling, and Sample Rate Conversion, Properly!

Product Design & Manufacturing: Software

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Sampling, and sample rate conversion, are critical processes in digital audio. The analogue signal must be sampled, so that it can be quantized into a digital word. In addition digital audio signals are often converted between sample rates, either as part of the conversion process, for mastering to a particular audio format, or varispeed playback. How does sampling affect the audio signal? What conditions must be met in order to sample audio signals properly? Does the sampling rate affect the timing, or lose information, from the music? Does changing the sample rate do any of these things. Are there further pitfalls? This tutorial will unravel these questions and, with audio examples, will show how sampling, and sample rate conversion, when done properly, can be done in a transparent and lossless fashion that preserves all of the original signal's qualities.

Presenter:
Jamie Angus, University of Salford - Salford, Greater Manchester, UK; JASA Consultancy - York, UK

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