"Blue notes" are specific musical notes that are slightly lowered in pitch, creating a unique sound often associated with jazz, blues, and rock music. These notes typically include the third, fifth, and seventh notes of a scale, which are flattened to evoke a sense of emotion and expressiveness. The use of blue notes helps to convey feelings of sadness or longing, making them a powerful tool for musicians. They are a defining characteristic of African American musical traditions and have influenced many genres, contributing to the rich tapestry of modern music.