André Tanneberger (born 26 February 1973), better known by his stage name ATB (A Touch of Bass), is a German DJ, musician, and producer of trance music. According to the official world DJ rankings governed by DJ Magazine, ATB was ranked No. 11 in 2009 and 2010, and No. 15 in 2011. In 2011, he was ranked as world No. 1 according to "The DJ List". He is best known for his 1999 single "9 PM (Till I Come)".

Tanneberger started his music career with the dance music group Sequential One. In February 1993, Sequential One released their debut single "Let Me Hear You", followed by "Dance"/"Raving". Singles brought them small financial benefits; André gained the opportunity to organize a mini-studio. In 1994 the band added three new members: Ulrich Poppelbaum, Woody van Eyden and vocalist Morpha. In early 1995 the House Nation label released the group's first album, Dance...