Spectrogram: Difference between revisions

Revision as of 05:53, 27 January 2007

Revision as of 09:00, 27 January 2007

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{{mergefromMergefrom|Waterfall_plot|date=January 2007}}

[[Image:Spectrogram_of_violin.png|thumb|300px|A [[spectrogram]] of [[media:Violin_for_spectrogramViolin for spectrogram.ogg|violin playing]] with linear frequency on the vertical axis and time on the horizontal axis. The bright lines show how the spectral components change over time. The intensity coloring is logarithmic (black is −120 [[dBFS]]).]]

The '''spectrogram''' is the result of calculating the [[frequency spectrum]] of [[windowed frame]]s of a compound [[signal (information theory)|signal]]. It is a three-dimensional plot of the energy of the frequency content of a signal as it changes over time.

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* [http://www.uisoftware.com/PAGES/acceuil_meta.html MetaSynth] for [[Apple Macintosh|Macintosh]];

* [http://hem.passagen.se/rasmuse/Coagula.htm Coagula] for [[Microsoft Windows|Windows]];

* [http://www.coppercloudmusic.com/enscribe/ Enscribe] for [[Linux|Linux]];

* [http://faculty.washington.edu/dillon/PhonResources/javoice/vowjavoice2.html JavOICe], a [[Java (programming language)|Java]] applet.

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* The song "Look" from [[Venetian Snares]]' album ''Songs About My Cats'', contains several images of his cats.

* The song "3recurring" from [[Plaid]] on the album "Rest Proof Clockwork" contains the recurring 3s represented as a logo on the cover of the "Not for Threes" album.

Some modern music is also created using spectrograms as an intermediate medium; changing the intensity of different frequencies over time, or even creating new ones, by drawing them and then inverse transforming.