He studied at the Mannheim Conservatory and earned a doctorate in music literature from Heidelberg University.

[1] Haas began his radio program, Adventures in Good Music, on WJR in Detroit, Michigan in 1959.

[2][7] Syndicated broadcasts of the show across the United States began in 1970 on WCLV, a radio station in Cleveland, Ohio.

That month, WCLV announced "with great regret" that it would broadcast and syndicate its last Adventures in Good Music program on June 29, 2007.

[10] The announcement explained that the number of stations that carried the show had dropped from more than 400 to fewer than 20, which made it unfeasible to continue the program's national distribution.

Most episodes of Adventures in Good Music are not available publicly because of copyright, which is closely held by his family, although three cassettes/CDs have been issued featuring Haas and his commentary: The Romantic Piano, The Story of the Bells, and Song and Dance.