Explanation of 歌にのせて


From JapanesePod101, with their translation:

ミュージカルは、歌【うた】にのせて物語【ものがたり】を展開【てんかい】する。  
A musical can tell a story with songs.

I understand that のせる means (amongst other things) "to take on board". Does
歌にのせて mean something like the musical is "riding on" (i.e. conveyed by) songs?
Also, what is the direct object of the transitive のせて?




The direct object of のせて is 物語, and the sentence means "the musical evolves
the story putting it on the songs".




The direct object of のせて is 物語, and the sentence means "the musical evolves
the story putting it on the songs".

