Symphonic poem Tchaikovsky's work as "Isle of the Dead" (1909) does its independence from it. A similar debt to his teacher Rimsky-Korsakov imbues Igor Stravinsky's "The Song of the Nightingale", excerpted from his opera "The Nightingale". Alexander Scriabin's "The Poem of Ecstasy" (1905–08) and "" (1908–10), in their projection of an egocentric theosophic world unequalled in other symphonic poems, are notable for their detail and advanced harmonic idiom. Socialist realism in the Soviet Union allowed program music to survive longer there than in western Europe, as typified by Dmitri Shostakovich's symphonic poem "October" (1967). While France was less concerned than other countries
Symphonic poems (Liszt) lament and final triumphal sections, it along with other modifications "rendered the 'Tasso Overture' an overture no longer". The piece became "far too long and developed" to be considered an overture and was redesignated a symphonic poem. When Liszt started writing symphonic poems, "he had very little experience in handling an orchestra ... his knowledge of the technique of instrumentation was defective and he had as yet composed hardly anything for the orchestra." For these reasons he relied first on his assistants August Conradi and Joachim Raff to fill the gaps in his knowledge and find his "orchestral voice". Raff,