Slow passage is a musical term used to describe a tempo that is slower than usual. ADAGIO, LARGO, and LENTO are all terms used to describe slow passage in music. ADAGIO is a tempo marking that indicates a slow and stately tempo, usually at a speed of 66-76 beats per minute. LARGO is a tempo marking that indicates a very slow tempo, usually at a speed of 40-60 beats per minute. LENTO is a tempo marking that indicates a very slow tempo, usually at a speed of 20-40 beats per minute.