"Gmelin ist not only a Mainstream drummer who knows every trick in the book, but also a well versed composer of timeless pieces with highly recognisable motifs."                                                      Josef Engels (Jazz thing)

Matthias started to play the drums at age nine. His first teacher was Hermann Roth with whom he stayed for five years. After that he took lessons from Rick Hollander, Falk Willis, Wolfgang Haffner, Keith Copeland, Michael Keul and Cloy Petersen.


From 1995 until 1999 he was a member of the Bavarian Youth Jazz Orchestra and the National Youth Jazz Orchestra of Germany.


In 2000 he went to New York City to study at the New School Jazz and Contemporary MusicProgram. His teachers there included: Joe Chambers, Reggie Workman, Billy Hart, Ralph Peterson, Charles Tolliver and John Riley.


Over the years he has appeared with Peter O`Mara, Johannes Enders, Johannes Faber, Marc Abrams, Bireli Lagrene, Ed Schuller, Miles Griffith, Jean Marie Machado, Henning Sieverts, the NDR Big Band, Joe Chambers, Cecil McBee and many more.


Since 2020 he is the head of the “Jazzprojekt" at the Freies-Musikzentrum in Munich.


From 2007-2011 he studied social work at the unsiversity of applied sciences in Munich (KFH).

Since 2012 he has been working for different welfare organisations, specializing in social work with refugees.