CS111 Intro to Programming

1. CS111 Intro to Programming Day 6: Pitch, Tempo and Transitions

2. Learning Objectives • Explain how the key of a song and pitch are related • Recognize popular strategies for creating musical transitions • Use tempo, pitch and transitions in a musical composition

3. Tempo

4. Changing Times • The sound clips in EarSketch each have a native tempo, loosely based upon their genre. • Hovering the mouse over a sound clip reveals its original tempo. • The setTempo() function can override the original tempo.

5. Common Music Tempos • Hip Hop: 85-95 bpm • Pop: 118 bpm • Techno: 120-125 bpm • Electro: 128 bpm • Dubstep and Trap: 140 bpm • Drum & Bass: 160-180 bpm

6. Pitch and Key

7. The windup and the... Doe, a deer, a female deer Ray, a drop of golden sun Me, a name I call myself Far, a long, long way to run Sew, a needle pullingthread La, a note to follow Sew Tea, a drink with jam and bread That will bring us back to Do (oh-oh-oh) • The pitch of a sound determines how high or low it sounds on a relative scale. • The key of a song defines the scale, or group of pitches, in which the piece is composed, as well as the tonic note. Keys are either major or minor, which tend to give a different impression to the listener.

8. Transitions

9. Handling Change Gracefully • Transitions are passages of music used to connect consecutive musical sections, resulting in a natural sounding piece. • Transitions can be used to build tension, change key or adjust the tempo. • Examples of transition techniques from Section 6.3: • Drum Fill • Track Dropout • Risers

10. MiniTask