Binary and Sound (2 marks)
Explain how binary is used to represent sound in a digital audio file.
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Sound
Sound File Calculations (3 marks)
A sound file has a sampling rate of 44.1 kHz and a sample resolution of 16 bits. If the sound is recorded for 5 seconds, calculate the size of the resulting digital sound file in bits.
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Advantage and Disadvantage of Increasing the Sample Rate and Resolution (4 marks)
Describe one advantage and one disadvantage of increasing the sample rate and resolution of a digital sound file.
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Sample Resolution (2 marks)
Define ‘sample resolution’ in the context of sound digitisation.
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Sampling Rate (2 marks)
Describe the term ‘sampling rate’ in the context of digital audio.
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The Need for Digital Sound (2 marks)
Explain why sound, which is an analogue signal, must be converted to digital form before a computer can process it.
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Sound File Calculation and Justification (3 Marks)
A recording studio needs to digitise a 2-minute audio clip for a client who wants a balance between good quality and manageable file size. They are considering a sample rate of 44.1kHz and a bit depth of 16 bits. Calculate the approximate size of the resulting digital audio file and discuss whether this setup is
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Impact on File Size and Quality (3 Marks)
Describe how the following factors affect the size of a sound file and the quality of its playback. Provide one point for each factor: a) Sample rate (Hz) b) Duration (seconds) c) Bit depth (e.g., 16-bit)
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Understanding Digital Sound (4 Marks)
Explain how analogue sound is converted into digital form. Your answer should include an explanation of the terms “sampling” and “bit depth”.
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Sound 3
What is meant by the term ‘bitrate’ and how does bitrate affect a sound file’s sound quality and file size?
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