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Representing sound, audio files are encoded (saved) as particular file…
Representing sound
analogue to digtital
humans hear in and record audio in analogue (using a microphone usually)
computers work in digital
computers need to convert the analogue sound into digital data
conversion done using an ADC
bit rate
the bitrae tells us how many bits of data are processed every second
usually measured in kilobits per second (kpbs)
the higher the rate the more realistic the sound
bit depth
bit depth is thenumber of bits available for each sample
16 bit has a resoloution of over 65 thousandpossible values and 24 bit has 16 million
the higher the bit depth, the higher the quality of audio
sample rate
how many samples of the soud are taken each second
it s saved as either an integer or a real number
each sample records the amplitude of the digital signal at a specific pont in time
more samples = more accurate reproduction = better quality = larger file sizes
audio files are encoded (saved) as particular file types