SpectroType Tone Generator

The Spectrogram

Any sound can be visually represented by its spectrogram, an image of its spectrum. The horizontal dimension corresponds to time and the vertical dimension corresponds to frequency. The intensity of a given frequency at a given time is given by a color plot at that {time;frequency} coordinate in the image space. Spectrogram views can be found in audio editing softwares such as Adobe Audition, Audacity and many others.

The Aphex Face

Viewing a spectrogram sometimes reveals curiousities, such as Aphex Twin's face synthesized as sound for the express purpose of being discovered in this manner (see the link at the bottom of this page).

Audiocheck's unique SpectroTyper tool does the same but uses plain text instead of images. SpectroTyper converts a series of characters into cool-sounding computer-like tones, secretly readable from a spectrogram view (linear frequency scale best).

The spectrogram below depicts a conventional audio recording, followed by SpectroTyper's output. The text "www.AudioCheck.net" has not been superimposed but comes from the particular spectrum of the sound itself!

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An audio recording followed by SpectroTyper's output

You can use Spectrotyper to hide easter eggs in your music productions or to tag copyrighted audio material with your own identifier or source information.

SpectroTyper

Waveform ..... Additive Synthesis - Tonal (A4) Input ........ Non-accented characters (ASCII 32-126) Max. Input ... 150 characters Speed ........ 100 ms / character Level ........ -6 dBFS Bandwidth .... 880-3520 Hz Sample Rate... 44.1 kHz Output ....... Uncompressed .wav file (16bit) downloaded to disk

Type your text here :

External Links

• The Aphex Face
• Spectrogram @ Wikipedia