In plain words
As melody, song and the play of sound all meet in a single note, so all of this merges in the one syllable, the Supreme, whose subtle body is space. Salutation to Nārāyaṇa.
Word for word
As melodic forms, song and the play of sound meet together in one śruti, so the Supreme: all this merges in the one syllable; this is the subtle body of space. Salutation to Nārāyaṇa.