Sonic Sum is an American hip hop group based in Bronx, New York.
[2] The group was described by CMJ New Music Monthly as "hip-hop's Radiohead".
[3] In 1999, Sonic Sum released the first studio album, The Sanity Annex, on Ozone Music.
[5] XLR8R called it "one of the most criminally slept-on albums of the indie hip-hop boom".
[6] In 2002, the group released the second studio album, Films, exclusively in Japan.