The "Bordogni Vocalises" are a collection of vocal exercises composed by Italian musician Marco Bordogni in the 19th century. These exercises are designed to help singers develop their technique, improve their vocal agility, and enhance their musical expression. They are widely used in vocal training and are suitable for singers of all levels. Each vocalise focuses on specific aspects of singing, such as breath control, pitch accuracy, and phrasing. The exercises are typically performed using various vowel sounds, allowing singers to concentrate on their vocal production without the distraction of lyrics. Many vocal teachers incorporate these exercises into their lessons to foster skill development.