Frontiers Perceived vibrato and the singing power ratio explain overall evaluations in opera singing Vibrato is the slight oscillation of pitch produced when the vocal cords are balanced and relaxed, creating a warm and expressive sound. Developing a natural vibrato is a key aspect of vocal What is Vibrato? Heavy voice = no agility!, , As someone with a naturally heavy voice, riffing and vibrato have always been difficult for me to achieve., , But once I learned that in order to improve your vocal 5 Secrets of Vibrato: How to Build a Smooth Natural Vibrato for Your Singing Voice Cari Cole Voice & Music Co. What Is Vibrato? Crafting, Controlling & Conquering Vibrato