Background
He was born in Speinshart, some 150 km from Nuremberg, but spent most of his life in Augsburg, where he worked as cathedral organist for two years. Speth was born in Speinshart, Bavaria, to teacher Heinrich Speth and his wife Margareta (née Vichtl).
Career
His only surviving music is a 1693 collection, Ars Magna Consoni et Dissoni, which includes toccatas, Magnificat versets and variations in south German style. Nothing is known about his life before 1692, when he applied for the position of organist of Augsburg Cathedral. The application, which contained Speth"s compositions, was accepted, and he was appointed organist on 4 November 1692.
The music he supplied with the application was published the next year in Augsburg as Ars magna Consoni et Dissoni.
In the files of the cathedral administration there is a note from 1705 showing that Speth had also to work in the office of the cathedral chapter. Ars Magna contains music intended for organ or clavichord: 10 toccatas (subtitled alische Blumen-Felder), 8 Magnificat settings, and three variation sets.