Question 1

Which of these do we not need to know in order to calculate a file size?

Accepted Answer

File name

Answer

Sample rate

Answer

Channels

Answer

Seconds (length of recording)

Question 2

Which of these is the correct formula for calculating sample rate?

Accepted Answer

(Frequency × sample resolution) × channels = sample rate

Answer

Frequency × sample resolution × seconds  = sample rate

Answer

Frequency + sample resolution  + channels = sample rate

Answer

Frequency × sample resolution / channels = bit rate

Question 3

What is the correct formula for calculating the file size of an audio file?

Accepted Answer

(Sample rate x resolution) x sample length = file size

Answer

(Sample rate x resolution ) / sample length = file size

Answer

Sample rate / resolution x sample length = file size

Answer

Sample rate + resolution + sample length = file size

Question 4

What is 1,411,200 bits per second in kbps?

Accepted Answer

1,411.2 kbps

Answer

14.11 kbps

Answer

1.411 kbps

Answer

14,112 kbps

Question 5

To find out the sample rate of 100 second recording with file size of 12, 000 bits and a sample resolution of 8 bits, which equation is correct?

Accepted Answer

(12,000 / 30) / 8 = 50 Hz

Answer

(12,000 / 8) x 30 = 1,500 Hz

Answer

(12,000 * 8) / 30 = 3200 Hz

Answer

(12,000 / 30) x 30 = 12, 000 Hz

Question 6

How do you convert a measurement in bytes to bits?

Accepted Answer

Multiply the number bytes by 8

Answer

Divide the number of byes by 10

Answer

Multiply the number of bytes by 10

Answer

Divide the number of bytes by 8

Question 7

How do you convert a measurement of bits to megabytes

Accepted Answer

Bits / 8 = bytes. bytes / 100,000 = megabytes

Answer

Bits / 8 = bytes. bytes / 1000 = megabytes

Answer

Bits x  8 = bytes. bytes / 100,000 = megabytes

Answer

Bits / 8 = bytes. bytes / 10,000 = megabytes

Question 8

What is 160,000 bytes in kilobytes?

Accepted Answer

160 Kb

Answer

16 Kb

Answer

1.60 Kb

Answer

1,600 Kb

Question 9

What is 160,000 bytes in megabytes?

Accepted Answer

0.016 Mb

Answer

1.6 Mb

Answer

16 Mb

Answer

0.0016 Mb

Question 10

What impact does compressing an audio file have on its file size?

Accepted Answer

It will be reduced

Answer

It will stay the same but be a lower quality

Answer

It will be increased

Answer

It will stay the same but be better quality

Question 11

As well as the file size, what else is changed during lossy compression?

Accepted Answer

The sample rate is decreased

Answer

The length of the recording is shorter

Answer

The sample rate is increased

Answer

The bits used is increased

Question 12

How does reducing the sample rate decrease the file size?

Accepted Answer

Less bits are needed to store the samples

Answer

The file length is shortened in the process

Answer

More bits are needed to store the sample

Answer

Less storage is needed as there is a smaller file length

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