Johann (Johannes) Speth (1664 – 1719) was a German organist and composer.
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.
His only surviving music is a 1693 collection, Ars Magna Consoni et Dissoni, which includes toccatas, Magnificat versets and variations in the south German style.
IMSLP only has very little of his work; but on this link:
https://tobis-notenarchiv.de/wp/
more can be found, from him, and many other little known composers.
This Toccata is a grand work on a small scale.
The opening with big and complicated harmonies (Maestoso Volles Werck) is followed by a short and dashing fugue.
Opening played on HW 16ft plenum and pedal + reed stops.
Fugue on RW 8ft plenum + trumpet with softer pedal reeds.