Martin Johannes Sebastian Isepp (30 September 1930 – 25 December 2011) was an Austrian‐born British pianist, harpsichordist, conductor and teacher.

[1] In 1938 the Isepps fled from Vienna to Britain, where Sebastian secured posts at the National Gallery in London and the Ashmolean Museum in Oxford.

[2] Isepp frequently conducted performances by Glyndebourne's touring company, and was an associate conductor of the Metropolitan Opera, New York.

[3] The obituarist in The Independent wrote: His long-standing collaboration with Dame Janet Baker remains a model of what can be achieved when two great artists join forces.

Their landmark recording, An Anthology of English Song, a pleasing juxtaposition of elegant vocal miniatures first released in 1962, attracted widespread critical acclaim.