Jim Cole & Spectral Voices' music features harmonic overtone singing, wherein each person sings two or more notes at once - also known as throat singing.  

Spectral Voices' music has been described as mystical, wondrous, achingly poignant, contemplative, ethereal, relaxing, transcendent, hypnotic, powerful, primal, soothing, intense, meditative and sublime... 

Click here to listen to samples of their music