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Learning objective

Digital representation of sound: Describe the digital representation of sound in terms of: • sample resolution • sampling rate and the Nyquist theorem. Calculate sound sample sizes in bytes.

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Topic

Representing images, sound and other data

Subtopic

Digital representation of sound

Aqa A Level Computer ScienceFundamentals of data representation

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Understand this objective

Quick explanation

Digital representation of sound: Describe the digital representation of sound in terms of: • sample resolution • sampling rate and the Nyquist theorem. Calculate sound sample sizes in bytes

  • This point belongs to Representing images, sound and other data, especially Digital representation of sound.
  • You need to be able to digital representation of sound: Describe the digital representation of sound in terms of: • sample resolution • sampling rate and the Nyquist theorem. Calculate sound sample sizes in bytes.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Why it matters

This objective helps connect Digital representation of sound to exam-style questions, flashcards, and revision notes for Representing images, sound and other data.

Quick student answer

What does sample resolution describe in a digital representation of sound?

Direct answer

The number of bits used to represent each sample

Key terms

  • Sample resolution: The number of bits used to represent the value of each sound sample.
  • Sampling rate: The number of samples taken from a sound each second.

Common trap

Forgetting to convert bits to bytes: After calculating the total number of bits, divide by 8 to convert the result to bytes.

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