Synaesthesia is a program that represents music graphically in real time as coruscating field of fog and glowing lines. It is intended as a visual accompanyment to music. Synaesthesia seeks to provide not just a visual representation of sound, but a representation of how sound is percieved. Its display combines information about the frequency, location and diffuseness of sound. The display is sufficiently detailed to make it possible to distinguish several individual instruments, singers, or special effects on screen by their location, shape and color, and sufficiently fast to distinguish individual drum beats and notes. WWW: http://www.logarithmic.net/pfh/synaesthesia