JOHN (JACK) CALLAHAN is a composer and sound engineer based in New York. He primarily works under the moniker die Reihe, taken from the journal edited by Herbert Eimert and Karlheinz Stockhausen. With this project he has released music with labels such as Anomia, Ascetic House, NNA Tapes and Salon. In 2013 he founded Bánh Mì Verlag, an imprint dedicated to contemporary experimental music and culture. As a composer his music has been performed and recorded by ensembles such as the S.E.M. Ensemble, the Wet Ink Ensemble and the Janacek Philharmonic Orchestra in such cities as New York, Amsterdam and Zürich.