Not really. A melody is any sequence of tones that one could perceive as being musically significant or interesting. You could generate a random melody by rando

Not really. A melody is any sequence of tones that one could perceive as being musically significant or interesting. You could generate a random melody by randomly playing notes from a pentatonic scale. Random noise is musically tone-less and without structure, closer to e.g. Metal Machine Music or such.