Analogue sound (Edexcel GCSE Computer Science): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the key difference between analogue and digital sound?
What is the key difference between analogue and digital sound?
Analogue is continuous; digital is discrete
What is sampling in digital audio?
What is sampling in digital audio?
Converting analogue sound to digital format
What does sample rate measure?
What does sample rate measure?
Number of samples taken per second
What does bit depth refer to in digital audio?
What does bit depth refer to in digital audio?
Number of bits used to store each sample
How many different volume levels can 16-bit depth audio represent?
How many different volume levels can 16-bit depth audio represent?
65,536
Which factors affect digital audio file size?
Which factors affect digital audio file size?
Sample rate, bit depth, length, channels
A mono audio file: 10 secs, 8,000 samples/sec, 8 bits. File size in bits?
A mono audio file: 10 secs, 8,000 samples/sec, 8 bits. File size in bits?
640,000
What sample rate does CD audio use?
What sample rate does CD audio use?
44,100 samples per second (44.1 kHz)
What happens when more samples per second are taken?
What happens when more samples per second are taken?
Better quality sound reproduction
What does fidelity describe in digital audio?
What does fidelity describe in digital audio?
How accurately digital matches analogue
How many channels does a stereo recording have?
How many channels does a stereo recording have?
2 channels (left and right)
Can analogue signals be perfectly reproduced in digital format?
Can analogue signals be perfectly reproduced in digital format?
No, there is always some loss