Harmony refers back to the "vertical" Seems of pitches in music, which implies pitches which can be performed or sung jointly at the same time to create a chord. Typically, What this means is the notes are played simultaneously, Even though harmony may also be implied by a melody that http://cunori.edu.gt/campus/app/upload/users/8/8923/my_files/differences-in-mp3-and-mp4-video-and-music-formats.html