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.

After great success in his native Germany, Sequential One gradually became known elsewhere in Europe. Their second album, Energy issued in Germany, was also released in the Netherlands, Austria, Switzerland and Hungary. Despite this success and growing popularity, two members of the project —Woody van Eyden and Morpha — left in 1998; only André and Ullrich remained in the group. In 1999 Sequential One ceased to exist. Shortly before the collapse, André managed to release the last single “Angels” and the compilation album Decades.

In 1998, Tanneberger started a solo project named ATB. His first track under this name was “9 PM (Till I Come)”, included on the Movin’ Melodies album, which topped the UK Singles Chart in 1999. The track featured a synthesised slide guitar riff that became popular. This guitar sound became the trademark of his early hits. ATB continues to evolve and change with every album. His current style involves more vocals and varied sounds, with frequent pianos.

His third album, Dedicated, was released in 2002. It includes two top hits: “Hold You” and “You’re Not Alone”. The title refers to the September 11 attacks. In 2002 ATB successfully took the ATC’s record label to court and sued and were forced to change its name to ‘A Touch of Class’.

In 2003, ATB released Addicted to Music, which included hits such as “I Don’t Wanna Stop” and “Long Way Home”. The same year, ATB’s first DVD of the same name was released. It featured all his videos, a tour documentary and photographs.

In 2005, ATB released Seven Years, a compilation album of 20 songs, including all his singles. Additionally, Seven Years includes six new tracks, including the single “Humanity” with Tiff Lacey and the 2005 rework of “Let U Go”. Many of ATB’s recent albums have featured vocals from Roberta Carter Harrison, singer for the Canadian band Wild Strawberries.

His next album, Trilogy, was released on 4 May 2007. The single “Justify” was released from The DJ 4 in the Mix compilation. The single “Renegade” was released on 12 April 2007, and features Heather Nova. The third single was “Feel Alive”, released in July the same year.

In a Trance.nu interview on 11 May 2007, ATB considered “Don’t Stop!” to be his worst production to date, and he no longer stands by it, due to it being similar to his first hit, “9 PM (Till I Come)”.

The album Future Memories was released on 5 May 2009. “What About Us” was released as the lead single prior to the album’s release. Further hit tracks include the collaborations with Tiff Lacey on “My Everything”, “Still Here” and “Missing” (a chillout cover of Everything but the Girl’s classic).

On 29 April 2011 Distant Earth was released, followed by Distant Earth Remixed on 16 September 2011.

On 8 June 2012, Sunset Beach DJ Session 2, was released. On 24 March 2013, ATB announced during A State of Trance 600 Miami at Ultra Music Festival that he planned to release his next album during the second half of 2013. In September ATB posted that he’s working on the last track of the album and that the new album will have 24 songs on two CDs. In addition, he announced that he would be bringing the ATB in Concert series to the United States with shows in Los Angeles, San Francisco, Chicago and New York City. Previously ATB had kept the past six ATB in Concert shows in Eastern Europe.

ATB released an album titled Contact on 24 January 2014.

ATB released neXt on 21 April 2017 through Kontor Records.

On 6 July 2018, ATB married his second wife, Laura Gabriela.