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Sound (Analogue and Digital (Humans hear in Analogue, Computers Work in…
Sound
Analogue and Digital
Humans hear in Analogue
Computers Work in Digital
Computers need to Convert Sound into Digital Data
Microphone Measures in Air Pressure
Microphone Translates Air Pressure into Electrical Voltage
Analogue to Digital Converter Digitises the Electrical Voltage to Bytes of Information
Computer Displays the Digitised Sound for Manipulation
Digital sound
Audio is Captured from Things like Microphones
The Computer or Converter Changes this Signal in Binary
Software Saves the Data as Sound
Bit Depth and Rate
Bit Rate
Tells us How Many Bits of Data is Processed every Second
Usually Measured in Kilobits per Second
The Higher the Rate the More Realistic the Sound
Bit Depth
The Number of Bits Available for Each Sample
The Higher the Bit Depth the Higher the Quality of Audio
Audio files are Saved as Particular File Types like MP3
Representing Sound
Factors that Affect Sound Quality
Sample Rate
Bit Depth
Bit Rate