A C augmented chord is a type of chord that consists of three notes: C, E, and G#. It is formed by taking a major triad and raising the fifth note by a half step. This creates a unique sound that is often described as bright or tense, making it useful in various musical styles. In music theory, augmented chords are typically denoted with a "+" symbol. For example, the C augmented chord can be written as C+. These chords are commonly used to create tension that resolves to other chords, adding emotional depth to a piece of music.