Wikipedia

File:Purple noise.ogg

Purple_noise.ogg (Ogg Vorbis sound file, length 10 s, 73 kbps, file size: 89 KB)

Description
English: 10 seconds of violet noise with an RMS value of -13.4 dB.
Українська: 10 секунд фіолетового шуму з середньоквадратичним значенням -13,4 дБ.
Histogram
Frequency analysis
Date
Source

See Image:White noise.ogg for details on generation and conversion.

First generate 10 seconds of Gaussian white noise sampled at 48 kHz: 

white=randn(48000*10 1,1);

Then differentiate it and normalize it to [-1.0, 1.0), so it can be written to a .wav file: 

purple=diff(white);
purple=purple/(max(abs(purple)));
wavwrite(purple,48000,16,'purple.wav');
The pristine, lossless file is accessible in File history, while the smaller lossy file is the one included in articles.
Author Omegatron
Permission
(Reusing this file)
I, the copyright holder of this work, hereby publish it under the following licenses:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
You may select the license of your choice.
(In short, this means that you can copy and modify the image freely as long as you provide attribution; preferably in the form of a link back to this page.)

Assessment

Media of the day This file was selected as the media of the day for 30 June 2023. It was captioned as follows:
English: Le Comte de Monte-Cristo, by Alexandre Dumas, in French. LibriVox recording by Jc Guan. Chapter 1 - Marseille – L’arrivée.
Other languages
Čeština: Četba první kapitoly z knihy Hrabě Monte Cristo od Alexandra Dumase ve francouzštině v rámci projektu LibriVox čte Jc Guan.
English: Le Comte de Monte-Cristo, by Alexandre Dumas, in French. LibriVox recording by Jc Guan. Chapter 1 - Marseille – L’arrivée.
Français : Le Comte de Monte-Cristo, par Alexandre Dumas. Enregistrement LibriVox par Jc Guan. Chapitre 1 - Marseille – L’arrivée.
Эрзянь: Монте-Кристо граф, Александр Дюма, хранцузонь кельсэ. LibriVox-с сермадыцязо Jc Guan. 1-це прявтксось- Марсель – Самось-пачкодемась.
Slovenščina: Le Comte de Monte-Cristo (en), Alexandre Dumas, v francoščini. Posnetek JC Guan, LibriVox. Poglavje 1 – Marseille – L'arrivée.
Українська: «Граф Монте-Крісто», Олександр Дюма, французькою мовою. Запис «LibriVox» від Jc Guan. Розділ 1 – Марсель – Прибуття.

Captions

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inception

27 April 2008

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current03:07, 28 April 200810 s (89 KB)OmegatronLossy Ogg Vorbis version
03:06, 28 April 200810 s (873 KB)OmegatronLossless FLAC-encoded version

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