Complex sentence: These orchestral arrangements are just instrumental arrangements, without singing, and are very much in the light orchestral music style, and treat the songs with considerable freedom, and so they are more suitable for listening to music and to learn the melodies.
Split into simpler sentences: These orchestral arrangements are just instrumental arrangements, without singing, and are very much in the light orchestral music style, and treat the songs with considerable freedom. So they are more suitable for listening to music and to learn the melodies.