Digital Music Quiz

What is digital music stored as on a computer?

• Analog signals

• Physical records

• A code of ones and zeros

• Magnetic tape

Which of the following devices is NOT shown in the history of personal audio devices timeline?

• Phonograph

• 8-track

• MP3 player

• Vinyl player

What happens when you hit the play button on a device that plays digital music?

• It creates sound waves that travel in one direction.

• It stops the sound waves from being created.

• It creates sound waves that travel in every direction.

• It records the sound waves onto a tape.

According to the timeline, which audio device came into existence after the cassette tape but before the compact disc?

• Phonograph

• 8-track

• Digital music player

• Record

What can affect the sound you hear when playing digital music?

• The color of the device

• The pitch and volume of the sound

• The size of the device's screen

• The battery life of the device

What makes surround sound in movies seem more real?

• The use of a single speaker

• The sound coming from one direction

• The sound being recorded nonstop

• The sound coming from many directions

How do sound waves make you feel like you are in the middle of the action in a movie theater?

• They are recorded nonstop

• They vibrate, moving tiny air particles back and forth

• They are sampled 44,100 times per second

• They are recorded in a digital format of 1s and 0s

What is the difference between analog and digital recordings according to the "Do You Know?" section?

• Analog recordings measure sound, while digital recordings vibrate air particles

• Analog recordings are sampled, while digital recordings are not

• Analog recordings are recorded nonstop, while digital recordings sample the sound many times per second

• Analog recordings use microphones, while digital recordings use speakers

How many times per second does a CD sample sounds?

• 1,000 times per second

• 10,000 times per second

• 44,100 times per second

• 74 minutes per second

According to the "Math Moment" section, how many more minutes of music can Sandra's digital music player hold compared to her CD?

• 3,926 minutes

• 4,000 minutes

• 4,074 minutes

• 4,074,000 minutes