Nice music can be used under normal circumstances. It is a more general term. If the melody of the music is emphasized, it can be said to be melodious music. If it sounds comfortable and pleasant, it can be said to be pleasant. Music, if the music itself is philosophical and the rhythm is not relaxed, don't use "pleasant". Even if some music is not cheerful, it can still be said to be pleasant (philosophical, meditative, profound), so look at the Chinese word "pleasant" The exact meaning to be expressed determines what word to use in English.

Many of the suggestions from other friends are good. The key is to decide which one to use based on what you want to say.