Children's choir, boys' treble voices, high-pitched unison, pure intonation, no adult vocals, no baritone, no bass, no female soprano, no vibrato, close-mic, intimate, clear diction, Soviet-era choir aesthetic, tape warmth, narrow broadcast EQ, [no male vocals] [no deep voices], Russian children’s radio-and-television choir sound, with clear treble unison, precise diction, and close, formal ensemble blend. Pair bright voices with piano, restrained strings, and lightly played snare; add gentle tape warmth and narrow vintage broadcast EQ. Keep the arrangement polished and earnest, with a simple melodic phrase whose emotional weight lands more deeply on repeat.