Deep house is a style of house music which fuses elements of Chicago house, disco, 80's soul, jazz-funk and Detroit techno. The Jazz influences of deep house are most frequently brought out by using more complex chords than simple triads (7ths, 9ths, 13ths, suspensions, alterations) which are held for many bars, which gives the tracks a slightly dissonant feel. The Disco music sound is a heavy influence in Deep House. The use of vocals is also more common in deep house than in many other forms of house music. Sonic qualities include soulful vocals, slow and concentrated dissonant melodies, smooth, stylish, and chic demeanor.