They played my favorite song (at the store/restaurant).
I heard my favorite song (at the store/restaurant).
「あー(いま流れている)この曲好き!」= Ah! I love this song!
「食事をしていたら好きな曲が流れてきて幸せな気分になった」= It makes me feel so happy when I hear my favorite song being played while I'm eating.
「今日は好きな曲ばかりかかる!」= They are playing all the songs I like today!
・「They played my favorite song. 」
(意味) (お店で)好きな曲が流れてきた。
<例文>How was the restaurant?/ They played my favorite song. The food was really good too.
<訳>レストランどうだった?/(お店で)好きな曲が流れてきた。ご飯もとても美味しかったです。
ご参考になれば幸いです。