Rock-a-bye Baby is an English nursery rhyme and lullaby. The song was first published in 1765, although it may be based on an earlier tune. It's public domain status has allowed the song to find its way into various video game, often when dealing with a baby.
King's Quest IV: The Perils of Rosella (DOS)
Rock-a-bye Baby plays in King's Quest 4 when you rock the cradle in the nursery of the abandoned mansion. The higher-end output features an airy ambient sound with the melody being played on a whistle.
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.022 in the resource files.
Other Kings Quest 4 Ports
It is unknown if the Amiga, Apple II, Apple II GS, or Atari ST ports have this song.
Moraff's Revenge (DOS)Steve Moraff arranged a PC Speaker version of the song for his dungeon crawler.
Many variations of lyrics have been penned for this song, but the most popular lyrics today are:
Rock-a-bye baby, on the treetop, When the wind blows, the cradle will rock, When the bough breaks, the cradle will fall, And down will come baby, cradle and all.
The original publication had the first line as, "hush-a-bye baby."