Lesson 1 Quiz

Question 1

What are the possible problems caused by quantization?

a. wow and flutter
b. pitch shift and distortion
c. pitch shift and noise
d. distortion and noise
e. noise and print-through

Answer 1

d. distortion and noise

Question 2

Which of the following is a characteristic of digital audio?

a. robust signals
b. code can be manipulated by high-speed processing networks
c. digital signal processing more versatile than with analog
d. low cost
e. all of the above are characteristics of digital audio

Answer 2

e. all of the above are characteristics of digital audio

Question 3

Which of the following is a reason to consider choosing a high sample rate?

a. Transients contain much higher frequencies than sustained tones.
b. Some signal processing algorithms sound better using higher sample rates.
c. Recordings made with higher sample rates have lower noise.
d. All of the above are reasons to choose a high sample rate.
e. a. and b. only

Answer 3

e. a. and b. only

Question 4

The set of sine waves that make up a complex waveform are called…

a. fundamentals
b. overtones
c. periods
d. cycles
e. decibels

Answer 4

b. overtones

Question 5

In order to accurately sample a sound within the range of human hearing, the minimum sample rate is…

a. 20 Hz
b. 10 kHz
c. 20 kHz
d. 40 kHz
e. 96 kHz

Answer 5

d. 40 kHz

Question 6

What is the range of human hearing?

a. 10 to 10,000 cycles per second
b. 100 to 100,000 cycles per second
c. 20 to 100,000 cycles per second
d. 100 to 20,000 cycles per second
e. 20 to 20,000 cycles per second

Answer 6

e. 20 to 20,000 cycles per second

Question 7

The frequency of a sound is measured in…

a. cycles per second
b. cycles per sample
c. seconds per cycle
d. seconds per sample
e. none of the above

Answer 7

a. cycles per second

Question 8

Which of the following characteristics of a sound we hear is based upon its waveform?

a. loudness
b. pitch
c. tone
d. spaciousness
e. none of the above

Answer 8

c. tone

Question 9

The process of assigning a captured value to the closest available amplitude based upon binary word length is called…

a. sampling
b. resolving
c. quantization
d. aliasing
e. conversion

Answer 9

c. quantization

Question 10

A digital audio sample is a…

a. snapshot of a signal, taken at regular time intervals
b. snapshot of a signal, taken on an as-needed basis
c. snapshot of a signal, taken twice every cycle of a sound
d. average of a signal, taken over its full duration
e. average of a signal, taken within a small time window

Answer 10

a. snapshot of a signal, taken at regular time intervals