Stefan Keller (born 1961) is a classical and jazz flute player and composer from Switzerland. He plays all kind of flutes like Quartertone, Glissando, Bebe, alto flute, and bass flute. Most unusual is his contrabass flute made by Kotato and Fukushima. All these instruments are also electronic flutes. One of his specialities is live looping. His actual solo performance called "Albido" works with the electronic flutes and different loop gear like Repeater and Gibson Echoplex.