The Twelve-Tone Technique is a method of musical composition developed by composer Arnold Schoenberg in the early 20th century. It involves using all twelve notes of the chromatic scale in a specific order, called a tone row, ensuring that no note is repeated until all others have been played. This technique creates a sense of equality among the notes, moving away from traditional tonal music. Composers who use the Twelve-Tone Technique often manipulate the tone row through various transformations, such as inversion (flipping the row upside down) and retrograde (playing it backward). This approach allows for greater creativity and complexity in music, leading to unique and innovative compositions.