Spectrogram: Difference between revisions

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This technique allows [[electronic music]] artists to "hide" images in their music. Examples include:
 
* [[Aphex Twin]] hid an image of himself in a spectrogram (using MetaSynth). The image can be found on Track 2 of the ''[[Windowlicker]]'' EP as a nine-second sweeping section right at the end. (It is recognizable in an [[MP3]], but the compression changes the spectrogram and it is not as clear as from the CD.)
* [[Aphex Twin]] hid an image of himself in a spectrogram (using MetaSynth). The image can be found on Track 2 of the ''[[Windowlicker]]'' EP as a nine-second sweeping section right at the end. (It is recognizable in an [[MP3]], but the compression changes the spectrogram and it is not as clear as from the CD.) Aphex Twin also hid the image of a spiral shape in his first track from the "[[Windowlicker]]" EP.
 
* The song "Look" from [[Venetian Snares]]' album ''[[Songs About My Cats]]'', contains several images of his cats.
 
* The song "3recurring" from [[Plaid]] on their album ''[[Rest Proof Clockwork]]'' contains the recurring 3s represented as a logo on the cover of the "Not for Threes" album.
 
* A possibly leaked MP3 version of "My Violent Heart" from the upcoming [[Nine Inch Nails]] album ''[[Year Zero (album)|Year Zero]]'' contains a few brief moments of static at the end, which when analyzed in a spectrogram, reveals the image of a hand reaching down from the sky. This image echoes a similar theme seen throughout the [[viral marketing]] campaign launched for the album.
* A potentially leaked MP3 version of "My Violent Heart" from the upcoming [[Nine Inch Nails]] album ''[[Year Zero (album)|Year Zero]]'' contains a few brief moments of static at the end, which when analyzed in a spectrogram, reveals the image of a hand reaching down from the sky. This image echoes a similar theme seen throughout the [[viral marketing]] campaign launched for the album. Another new Nine Inch Nails track from Year Zero (April 17th) has been found on a flash drive in a bathroom stall on their current European tour. This time it's "Me, I'm Not." Along with the song, was an mp3MP3 of cricket chirping, which when put through a spectrogram revealed the number: 216.333.1810.
 
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.