The Night Time theme is heard when 9:00 PM rolls around. The game maintains a real-time clock, so, if the player spends several hours in the game, they will hear this tune, or, the game will jump directly to 9:00 PM once Rosella collects the three items demanded by Lolotte. The theme was composed by William Goldstein.
Games
King's Quest IV: The Perils of Rosella (DOS)
Five different types of output were designed for the DOS release, each output corresponds to a different group of devices, the Roland, Yamaha, OPL2, 3 Voice, and PC Speaker.
The file is sound.067 in the resource files.
Other Ports
It is unknown if the Amiga, Apple II, Apple II GS, or Atari ST ports have this song.
Links