This is music from the BioShock 2 audio files.
This video combines three different versions of Cohen's Scherzo that play in Dionysus Park. These songs only play if you gather ADAM from corpses in Cohen's Collection and in the basement storage area.
The title of these tracks (found in the file names) are "Gallery - Cohen Ambush A", "Gallery - Cohen Ambush B", and "Gallery - Cohen's Scherzo". The prefix "Gallery" means that this song is played during the Dionysus Park level in-game.

BioShock 2 is owned by 2K Games, and this music was composed by Garry Schyman. The screenshot of the carousel was made by JLBiggs, a member of the 2K Forums. All of the paintings in this video came from the BioShock 2 game files.