[1][2] Born in Ampfing, Windsperger, son of a well-known organist and school teacher, received his first basic musical education from his father, who he lost at the age of five.
Windsperger nevertheless remained true to music, even when he first began his training as a primary school teacher in Rosenheim, where he had moved with his mother in 1898, at a taxidermy institute [de].
According to the judgement of H. Teibler in the Allgemeine Musikalische Zeitung of 24 February 1905 (p. 151), however, he thereby "only provoked the unwillingness of all well-meaning people; this concert was an assassination of the good will of the audience".
For example, he transcribed a large part of Verdi' or Wagner' operas as well as difficult solo or chamber music compositions by other composers into easily playable piano scores.
About Windsperger's work as a composer of late romanticism [de] on the way to contemporary music, Anton Würz writes in volume 14 of the Musiklexikon Die Musik in Geschichte und Gegenwart: