Sphero Symphony



Sphero Symphony is the name (not even a trademark) given by SNK to the use of stereo in some early NeoGeo games.

As it can be seen in the Art of Fighting's source code file sys/SOUND.SRC, the process simply pans sound effects left, center, or right, depending on the sprites positions on the screen. Since the NeoGeo only has 1-bit panning for FM channels, there are only 3 different zones with constant power:


 * Left, full volume
 * Left + right, half volume
 * Right, full volume

Panning is set by the game engine through special commands sent to the sound driver.

Nothing more than that.

=Games bearing the logo=
 * Riding Hero
 * Alpha Mission II
 * Ninja Combat
 * Cyber-Lip
 * The Super Spy
 * Mutation Nation
 * Sengoku
 * Burning Fight
 * Ghost Pilots
 * Last Resort
 * Soccer Brawl
 * Fatal Fury - King of Fighters
 * Football Frenzy
 * Crossed Swords
 * Thrash Rally
 * King of the Monsters 2 - The Next Thing
 * Baseball Stars 2
 * Art of Fighting
 * Fatal Fury 2
 * Andro Dunos