What is the Difference between melody and tune?

Answer 1

The melody of a song is a specific part of the song. Often in a song with many instruments the melody is the leading string of notes that one would pick out and hum or whistle. The same song may also have a bass line that the bass instruments would play. Together these parts together could be described as the tune although sometimes it is used as a synonym for melody. Tune is a less technical term than melody.