WHAT THE LISTENER NOTICES MAINLY WHEN LISTENING TO MUSIC
A listener notices mainly the next factors with the following order due to simplicity of perception
1) The rhythm if it is slow or fast
2) The timbre of the instrument or voice that sounds the melody
3) The emotional meaning of the melody (sad, happy, resolving to serenity or escalating to tension etc)
4) The structure of the arrangement (few or many instruments etc)
5) The emotional meaning of the harmony behind the melody
