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As a child, I listened to a lot of music: my father sang (as an amateur, however, he also had knowledge of music theory), my mother played the piano (as an amateur); an amateur string quartet often gathered at friends' (behind the wall); I loved to listen (at the age of 7-8) <...> to the surrounding repertoire: gypsy romances, duets (Vilboa, Varlamov...), romances by Tchaikovsky <...>. My father never studied music. He taught himself the notes and, having a tenor voice, often sang. He read from sight excellently, playing the piano with four hands.
Autobiography of 1927, sent as an attachment to a letter to D. R. Rogal-Levitsky on September 22, 1927.