Acidity is the fifth album by Indonesian avant-garde metal band Kekal.

[2][7][8] It marked the return of guitarist Leo Setiawan to the band, and includes the vocal talents of founding member Newbabe.

[8] According to Jeff, the title is referencing acid indigestion caused by urban stress and eating fast food, and represents the stress of city living and economic hardship.

[2][13] Other elements incorporated into the sound were jazz and ambient passages as well as double-bass drum blasts.

[6] Other elements cited were "gothic wave", jazzy melodies and improvisations, "pop song orientation with metal background", "progressive techno-electronic", "wild" progressive rock, and "some mad freakout theatrical avant-garde vocals", ambient guitar feedback, and "perhaps of few seconds of some Indonesian element.