what is the theme of das rheingold scene 4?
After Wotan seizes the ring from the captive Alberich, the dwarf's agonised, self-pitying monologue ("Am I now free?") ends with his declamation of the "Curse" motif – "one of the most sinister musical ideas ever to have entered the operatic repertoire"
Das Rheingold
After Wotan seizes the ring from the captive Alberich, the dwarf's agonised, self-pitying monologue ("Am I now free?") ends with his declamation of the "Curse" motif – "one of the most sinister musical ideas ever to have entered the operatic repertoire", according to Scruton's analysis: 
what is rhinemaidens? They are the three water-nymphs ("Rheintöchter" or "Rhine daughters") who appear in Richard Wagner's opera cycle "Der Ring des Nibelungen". when was the first time this was performed? 1876 who wrote this? Richard Wagner what was the genre of the opera? Epic music drama how many acts is this opera divided into? Four where is the composer from? Leipzig, Germany can you tell me names of other works he has done apart from the former one? Der fliegende Holländer (The Flying Dutchman, 1843); Tannhäuser (1845); Lohengrin (1850). has he  participated in any festival? Bayreuth Festival
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Das Rheingold [SEP] Fourth scene
After Wotan seizes the ring from the captive Alberich, the dwarf's agonised, self-pitying monologue ("Am I now free?") ends with his declamation of the "Curse" motif – "one of the most sinister musical ideas ever to have entered the operatic repertoire", according to Scruton's analysis: "It rises through a half-diminished chord, and then falls through an octave to settle on a murky C major triad, with clarinets in their lowest register over a timpani pedal in F sharp". This motif will recur throughout the cycle; it will be heard later in this scene, when Fafner clubs Fasolt to death over possession of the ring.