REPRESENTING SOUND 

• Analogue sounds signals are continuous
• Digital sounds are discrete 
• Sound is digitized by repeatedly measuring and recording the sound wave 

Sounds must be converted into a digital form to be stored and processed by a computer.

ADC (Analogue to Digital Converter) or DAC (Digital to Analogue Converter) is used to process the input or output 

With any machine, there are three main processes:

Input – Processing – Output 

• The higher the resolution the higher the sampling rate
• The higher the sampling rates, the better the quality 
• The more the data the more accurate the sound 
• The bigger the data, the bigger the file size 

The accuracy of the recording and the file size increases as the sample rate and resolution increase.

Binary addition

When doing binary addition, these are the possible answers you can get per unit/ space: 

0 + 0 = 0

0 + 1 = 1

1+ 0 = 1

1 +1 = 0^1

1 + 1 + 1 = 1^1 

Example: 

    ^1     ^1

     1   0  1  0  0  0  0  1

+   0   1  1  1  0  0  0  0

——————————

 1  0   0  0   1  0  0  0 1

——————————