In this traditional singing style, female singers produce melodies from deep in their throats.

The singer produces a basic note as well as its harmonics, which have a flute- or whistle-like tone.

It may be that singers with different voice types can't produce that sound.

Some tracks use reggae toasters or singers to produce a more accessible form of the music.

Moore also doubled as lead singer on many of the band's heavier songs; bassist and pianist Levine produced their early albums.

Research has revealed that not all speakers and singers produce falsetto in exactly the same way.

However, this in itself says little about the rather distinctive sound that traditional singers produce.

The singer would also produce another song titled "You're the One".

The singer produced a dark, lugubrious, thick-vibrato sound that seemed to rumble, sometimes coarsely, from deep in her chest.

But singers working together typically produce something far better and more exciting than they could individually.