The longest cello marathon was set by Shamita Achenbach-König at 24 hours in Dachau, Munich, Germany from 5-6 November 2005.

She played music by Bach, Boccherini, Haydn, Beethoven, Schubert, Brahms, Mendelssohn, Faure, Reger, Chopin, Schumann, Tschaikowsky and Dvorak. She also played spirituals and folk songs.