None of Beethoven's songs were symphonies. A song is a song; it involves an arrangement for voice with accompaniment. A symphony is an orchestral work.
Beethoven wrote over 160 songs, known as lieder, but only 9 symphonies.
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Gustav Holst 4 Songs, for soprano (or tenor) and violin, Op.35,
H.132
and Bach arias for soprano and violin
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Aaron Copland was famous for using themes from American folk
songs in his works.