Since hip hop's beginnings, producers have reworked sounds past and present in search of the perfect beat.

Beats are the backbone of hip hop culture, supplying the soundtrack for rhymes, dance and graffiti art.

In the States, top beat makers command huge fees for their music. Their New Zealand counterparts have more modest expectations but a thriving community of bedroom producers continues to hunt for new sounds.

The Secret Life of Beat Makers talks to P-Money, Scratch 22 and Fire + Ice and goes behind the scenes of their industry for a nuts and bolts look at beat making.