There is more than one band called ACID:
(1) An Austrian rock band of the early 70's.
(2) A speed metal band from Belgium, founded in 1980.
(3) A hardcore punk band from Tokyo, Japan and existed from the late 80's to the early 90's
(4) A Japanese rock band founded by Siam Shade's former vocalist, Hideki in 2003 (see ＡＣＩＤ).
(5) A french rapper or band.
(6) A Polish drum & bass DJ.
(7) A Romanian rapper from Brasov.
(8) A psychedelic rock group from San Francisco. Read more on Last.fm