👉 A semitonal is a type of music that features sustained notes played on an instrument with a high frequency. This style emerged in the 20th century, and it is characterized by its use of sustained chords or notes that are played over and over for extended periods, often accompanied by a complex melodic line. Semitonal music can be found in various genres such as jazz, blues, and classical music, but it has also been used in contemporary electronic music. What specific aspect of