Mappings

Visual-to-visual

Distorting mirrors
Myron Kruger's early pieces
Morphing
Photoshop
Bit-101 Laboratory: 02 jan 20
Shane Cooper: Parasight, 2002 (digital mirror finds matching person)

Music Visualization

Sound-to-Image

Winamp Plug-ins

Tone Color

MIDI-to-image

Jared Tarbell (Levitated): Moonlight, 2002.

Data-Visualization

Lisa Jevbratt / C5: 1:1 (1999)
Benjamin Fry: Valence (1999)
Leander Seige: TDSFB. (Interactive 3D Data Directory Visualization.)

Lev Manovich: Information Aesthetics, 2000/2001

Text-to-text

Eliza
Machine Translation

Music generation

Any one-dimensional signal or sequence can be translated into a sound signal or MIDI-sequence in various ways.
    

Text-to-MIDI

C. Church: TransMid.

Image-to-sound

Artificial Music

The vOICe

Data-to-sound

John Cage: Atlas Eclipticalis, 1961. Composed from astronomical charts.
Charles Dodge: The Earth's Magnetic Field (1970). Fluctuations in the magnetic field of the Earth translated into sound.

Universität Bielefeld - Technische Fakultät - AG Neuroinformatik: Sonification Examples

Gregory Kramer et al.: Sonification Report, 1997.

Sonification links.
Luka Princic: Music for Hard Disks. (2001)
Edwin van der Heijden: MsWord.