Characters
(singing) Maria, say it loud and there’s music playing; say it soft and it’s almost like praying.
— Tony • West Side Story

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The sung lines imagine Maria’s name changing character with the way it is spoken. Said aloud, it becomes music; said softly, it approaches prayer. The comparison turns a name into an expression of delight and reverence, making sound carry the intensity of affection.
Context reviewed