Analogue sound (Edexcel GCSE Computer Science): Flashcards
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Practise the cards
14 cards from this deck
Analogue sound
Analogue sound
Continuous waves travelling through air, water, or materials
Analogue vs digital signals
Analogue vs digital signals
Analogue: continuous/smooth; Digital: discrete samples
Sampling (in sound)
Sampling (in sound)
Process converting analogue sound to digital format
Amplitude (sound wave)
Amplitude (sound wave)
Height of the sound wave
Sample rate
Sample rate
Number of samples taken per second
Bit depth
Bit depth
Number of bits used to store each sample
Volume levels with 8-bit depth
Volume levels with 8-bit depth
256 different volume levels
Volume levels with 16-bit depth
Volume levels with 16-bit depth
65,536 different volume levels
Effect of higher bit depth
Effect of higher bit depth
Better sound quality (more subtle variations captured)
Audio file size formula
Audio file size formula
Stereo recording effect on file size
Stereo recording effect on file size
Doubles file size (two channels: left and right)
CD audio sample rate
CD audio sample rate
44,100 samples per second (44.1 kHz)
Fidelity
Fidelity
How accurately digital copy matches original analogue sound
Perfect digital reproduction of analogue sound
Perfect digital reproduction of analogue sound
Impossible - always some loss of information