Non-lexical vocables in music
Non-lexical vocables, also known as wordless vocals, are a form of nonsense syllable used in a wide variety of music. Common English examples are "la la la", "na na na" and "da da da", or the improvised nonsense sounds used in scat singing. Non-lexical vocables are found in a wide range of music from around the world and across many genres of music, and may be mixed with meaningful text in a given song or performance.