November 19th, 2024

Digital Show and Tell (2013): Xiph's Monty on Digital Audio

Xiph.Org released "Digital Show & Tell," a video exploring digital audio signals, covering sampling and quantization. It includes demonstrations, downloadable source code, and a Wiki for community discussion.

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Digital Show and Tell (2013): Xiph's Monty on Digital Audio

Xiph.Org has released a new video titled "Digital Show & Tell," which delves into various aspects of digital audio signals and their real-world behavior. The video continues the organization's tradition of providing dense information, covering topics such as sampling, quantization, bit-depth, and dither. It features demonstrations using both modern digital analysis tools and vintage analog equipment to ensure reliability in the findings. Viewers can download the source code for the demonstrations to experiment independently. To facilitate further discussion and learning, a Wiki has been established, allowing users to ask questions and engage in debates about the content. The video is available for download in multiple formats, including WebM and Ogg, and is distributed under a Creative Commons Attribution-ShareAlike license. Subtitles in various languages are also provided, and the organization encourages community contributions for translations.

- Xiph.Org's "Digital Show & Tell" video explores digital audio signals and their behavior.

- The video includes demonstrations of key concepts like sampling and quantization.

- Viewers can download source code for hands-on experimentation.

- A Wiki is available for further discussion and information on the topics covered.

- The video is distributed under a Creative Commons license and offers subtitles in multiple languages.

Link Icon 2 comments
By @112233 - 5 months
This is a very infuential video. I often see it referenced when digital audio gets explained.

It is also very insiduously misleading in a way that is hard to fault it for.

That "band limited signal" that uniquely satisfies Niquist theorem? That is an infinite, periodic signal.

No finite (e. g. a song), aperiodic signal can be band limited. That includes any signal with transients.

Well, how big is the difference? How much overhead/error/lookahead is needed to approach the Niquist result? It is never mentioned by people referring to this theorem when talking about audio signal sampling!

And I wish it was mentioned and explained.

By @shmerl - 5 months
A classic. I wish Xiph developed Daala into a fully functional video codec.