David Powell and The Speekers

The song begins with original music and then moves into ancient Egyptian funerary music (still used today by the Coptic Church during Easter). A funerary rite in ancient Egypt involved Isis and her sister, Nephthys, singing a lament to Osiris, Lord of the Underworld, seeking his return.
On this track, two Egyptian sisters, Treza and Rania, sing a lament to Isis seeking her return.
They count in the ancient music, not with 'one, two, three, four' but with the Arabic for 'one, five, seven, four'. In Arabic this is written ١٥٧٤ which is the name of the album.