Answer:
"It was like honey to my ears".
Step-by-step explanation:
Here Angela is talking about the sweet and harmonious music played by Gemma. So, she talks about honey (Or, the music) . Honey is sweet and smooth. So instead of using "The music was smooth and harmonious", she uses "It was like honey to my ears", to make the sentence more vivid. But do remember that she is talking about the music as honey!
Hope this helps!