A John Adams's Short Ride in a Fast Machine is an adventurous and exciting work of program music for orchestra, quite different than Aaron Copland's Appalachian Spring. After repeated listening, what do you think Adams is trying to express about his "Ride"? How does the mood or energy of the music change as it progresses? Explain your answer using appropriate references to the musical element vocabulary (dynamics, tempo, rhythm, melody, texture, form, harmony, etc.). How do you think Adams's "Ride" compares with Richard Wagner's "Ride of the Valkyries," which was written 100 years earlier