FTP, identify  this man, whose tales were the basis for the opera by Jacques  Offenbach.
He actually composed two operas of his own, Undine and  Aurora, and he changed his third name to Amadeus in honor of  Mozart. Author of the novel The Devil's Elixir, he is better  known for his Gothic horror stories collected in Fantasiestucke,  or Fantasy Pieces. These stories were the inspiration for  Hindemith's Cardillac, Schuman's Kreisleriana, Tchaikovsky's  Nutcracker, and another famous opera which features the author  himself recalling past love affairs in a tavern. FTP, identify  this man, whose tales were the basis for the opera by Jacques  Offenbach.
He actually composed two operas of his own, Undine and  Aurora, and he changed his third name to Amadeus in honor of  Mozart.
Ernst Theodor Amadeus {Hoffman}