Image:Purple noise.ogg
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Purple_noise.ogg (Ogg Vorbis sound file, length 10s, 73kbps)
| This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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| Description | 10 seconds of violet noise with an RMS value of -13.4 dB.
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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. |
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| Permission (Reusing this image) |
(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.) |
File history
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| Date/Time | Dimensions | User | Comment | |
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| current | 03:07, 28 April 2008 | 10s (89 KB) | Omegatron | (Lossy Ogg Vorbis version) |
| 03:06, 28 April 2008 | 10s (873 KB) | Omegatron | (Lossless FLAC-encoded version) |
File links
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