Those most blessed with perfect pitch are, according to this New Scientist article, speakers of tonal languages. Next come those who begin learning a pitched instrument at a very young age – between 3 and 6. However, many musicians tend to exist on – or even move around – a continuum of absolute and relative pitch, depending on circumstances. Factors could include hearing music being played on their own instrument; hearing real notes as opposed to pure sine waves; being able to identify a chord more easily that an isolated note. If it is a skill which we can work at, then what better place to start than here?