Dieter Birr
In his second solo album, Maschine, released in 2014, Julia Neigel, Wolfgang Niedecken and Toni Krahl also appeared as duet partners. The album contains some new additions to well-known Puhdys hits from the 1970s, including Geh zu ihr and Wenn ein Mensch lebt. Also in 2014, on his 70th birthday, Birr's autobiography Maschine – Die Biografie. was released.