Contextual Analysis of "one note" in Lyrics

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sounds like a light ray

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and the note he sang was this

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and the note he plays is this

there's nothing on earth it's challenge can take

excepting one note pure and easy

or nearly nothing

as i must come back to you

or nearly nothing

as i must come back to you

so i come back to my first note as i must come back to you

any one who wants the whole show show do-re-mi-fa-so-la-ci-do

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and the note he sings was this

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sounds like a light ray

next song

next

and i can't believe it's true

can leave me sad and blue

pleasure spiked with pain

could make me float