Melodies, or trigger tunes (as I call them with my students), are the most natural, efficient, and effective way to develop perfect pitch. Think about it - does music exist in isolation? So why learn it that way?
Melodiesestablish a firm foundation for your 'internal pitch chroma template' to develop, form, and stabilize, thereby acquiring absolute pitch! And...
Melodies make perfect pitch FUN for kids and adults!
But please don't take my word for it! PROVE IT YOURSELF!
Pitch Paths Video
VIDEO NOTE: To begin developing absolute pitch, simply listen to
the melodies in the first half of the video. (The letters spoken after
the melodies indicate the starting pitch, not necessarily the key
signature.) Then take the tone tests in the second half of the video,
asking yourself, "What melody starts with this pitch?" The idea is
that, after repeated exposure to the melodies, the tones will begin to
"trigger" their respective tunes; like learning "A" is for "Apple." Keep practicing and you'll begin experiencing absolute pitch!