The sound of the drum is very important. It is the subtle variations in timbre and ever-changing overtones of the drum that allow the shaman to communicate with the spiritual realm. Part of the shaman’s training involves learning to hear and interpret a larger range of frequencies than the normal person can. The shaman listens and finds the right tone, the right sound to which the spirits will respond. Through the many tones, pitches, and harmonics of the drum, the shaman communes with the subtle and normally unseen energies of the spirit world.