A-level Computing/AQA/Problem Solving, Programming, Data Representation and Practical Exercise/Fundamentals of Data Representation/Analogue and digital



 For a computer to store sound files we need to get the continuous analogue sound waves into discrete binary values:



What is the difference between analogue and digital data? Analogue data is continuous, allowing for an infinite number of possible values. Digital data is discrete, allowing for a finite set of values Name the device used by computers to convert sound files into sound coming out of the speaker Digital to Analogue converter Name a peripheral that could be used to feed sound into an ADC A microphone

This is a diagram of a system set up for recording, storing and saving sound. Fill in the numbers from the following options
 * ADC
 * DAC
 * Headphones
 * Main Memory
 * Microphone
 * Secondary Storage




 * 1) Microphone
 * 2) ADC
 * 3) DAC
 * 4) Main Memory
 * 5) Headphones
 * 6) Secondary Storage

Why is it difficult to save analogue sound waves in a digital format? Analogue is continuous data, converting continuous data to discrete values may lose some of the accuracy