Alois Ottenwälder was born in 1869 at Dalkingen, a village in the territory of the former (Catholic) ecclesiastical principality of Ellwangen, which in 1802 had been annexed by (Lutheran) Württemberg. He died in 1946.
This is the second piece from Drei Tonstücke für Orgel 1911.
1. Introduktion und Fuge
2. Gebet
3. Präludium und Fuge
Music here;
http://conquest.imslp.info/files/imglnks/usimg/a/a4/IMSLP324179-PMLP524825-AOttenwälder_3_Tonstücke_für_Orgel.pdf
I have used the 2012 Kamiński organ of St. Anne's, Długa Kościelna for this because it does not appear here very much and it is a wonderful little instrument as you will hear.
Ottenwälder studied at the Stuttgart Konservatorium with Samuel de Lange and at the Munich Konservatorium. He worked as a high school teacher, but in 1901 also became organist and musical director of the new parish church of St Elisabeth in Stuttgart, an ambitious project of the city's Catholic minority that had just been opened in the presence of the Württemberg royal family (the heir apparent, prince Albrecht, was Catholic himself).
Ottenwälder published a number of works for organ; I do not know if he composed any other kind of music. His younger brother Josef Georg (1883-1959) studied theology and church music at Tübingen and Vienna; having been ordained to the priesthood he became choral director of Rottenburg cathedral in 1917. He composed choral works.
Notes by Concert Hall member Einer von Weitem.
He was the first to play something by Ottenwälder and you can hear it here;
https://www.contrebombarde.com/concerthall/music/15691