Deep house is a style of house music which fuses elements of Chicago house, 80's soul, jazz-funk and Detroit techno. The Jazz influences of deep house are most frequently brought out by chords using more complex than simple triads (7ths, 9ths, 13ths, suspensions, alterations) which are held for many bars, which give the tracks a slightly dissonant feel. The use of vocals is also more common in deep house than in many other forms of house music. This genre is to House music like Superman is to the Superfriends: indispensable. Everything that other House genres can do, Deep House does. Sometimes better. In fact, this genre IS House music. It encapsulates everything House music is supposed to do, supposed to sound like, supposed to make you feel, to a T. If there was no Deep House, House just wouldn't be House. Deep House is the sound that holds the whole genre together. There are several sub-sub-genres of this, all of it good, including Mark Farina's own special brand of Mushroom Jazz.