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Representing sounds - Coggle Diagram
Representing sounds
Analogue to Digital
Computers need to convert the analogue sound into digital data (binary)
Conversion done using an ADC (Analogue to Digital Convertor)
Computers work in digital
Humans hear in and record audio in anologue (using a microphone usually)
Sample Rate
Each sample records the amplitude of the digital signal ar a specific point in time
How many samples of the sound are taken each second (Measures in hertz)
It is saved as either an integer or a real number
More samples = more accurate reproduction = better quality = larger file sizes
Bit Depth
16 bit has a resolution over 65 thousand pssible values and 24 bit has 16 million
Audio files are encoded as particular file types
Bit depth is the number of bits available for each sample
The higher the bit depth, the higher the quality of audio
Bit Rate
The bit rate tells us how many bits of data a processed every second
Usually measured in kilobits per second (kbps)
The higher the rate the more realistic the sound