Data Representation - How Computers Represent Sound (GCSE Computing)

The following is a GCSE Computing test covering 'Data Representation - How Computers Represent Sound'

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Question 1

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In digital audio, what is a "sample"?

What does audio bit rate measure?

What does bit depth (bits per sample) determine in digital audio?

What does PCM stand for and what is it?

Which unit is used to measure the sample rate of digital audio?

How is aliasing usually prevented before analogue-to-digital conversion?

According to the Nyquist theorem, what is the highest frequency that can be accurately sampled?

Which type of audio compression reduces file size by discarding some original audio data, often causing a loss in quality?

What is the effect of increasing bit depth while keeping sample rate constant?

What does MIDI store compared to sampled digital audio?

What is the role of a DAC in a computer audio system?

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