"To hear the song" means to understand or grasp the meaning or message being conveyed, often in a figurative sense. It refers to fully comprehending and connecting with a story, idea, or situation. Full definition
If that doesn't pose enough challenge, try not to smile when hearing the song and sound effects in - game or when reading the life lessons. (indiegames.com)
You will hear the song of the waves breaking on the beach and the birds while having your morning coffee. (paradizo.com)
Ever heard a song on the radio and wanted to know what it was? (t3.com)