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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What is quantisation error (quantisation noise) in digital audio?

What term describes how many times per second an audio signal is measured when digitising sound?

Why might increasing the sample rate beyond what is required be wasteful?

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

Calculate the bit rate (bits per second) for CD-quality audio: 44.1 kHz sample rate, 16-bit depth, stereo (2 channels).

Why are anti-aliasing filters typically low-pass filters?

What does PCM stand for and what is it?

What is quantisation in the context of digital audio?

Which sample rate is standard for audio on audio CDs?

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

Which of the following is a commonly used lossy audio format?

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