Representing Sound (AQA GCSE Computer Science): Flashcards
📚Flashcards
Practise the cards
14 cards from this deck
ShowHide
Practise the cards
14 cards from this deck
What is sample rate?
What is sample rate?
How many times per second we measure the sound wave
Unit sample rate is measured in
Unit sample rate is measured in
Hertz (Hz) - samples per second
Standard CD sample rate
Standard CD sample rate
44.1 kHz (44,100 samples per second)
What is sample resolution (bit depth)?
What is sample resolution (bit depth)?
Number of bits used to store each sample
What sample resolution measures
What sample resolution measures
Amplitude (loudness) of the sound wave
CD standard sample resolution
CD standard sample resolution
16-bit resolution
Number of values in 16-bit resolution
Number of values in 16-bit resolution
65,536 (which is )
What is duration in sound recording?
What is duration in sound recording?
How long the recording lasts in seconds
File size formula (in bits)
File size formula (in bits)
Sample rate × Resolution × Duration
How do stereo files compare to mono?
How do stereo files compare to mono?
Stereo is double the size (2 channels vs 1)
Convert bits to bytes
Convert bits to bytes
Divide by 8
Convert bytes to megabytes
Convert bytes to megabytes
Divide by 1,000,000
Higher quality settings result in
Higher quality settings result in
Better sound but larger files and slower transfers
Three factors affecting sound file size
Three factors affecting sound file size
Sample rate, sample resolution, duration