Sound

• sound is sampled and stored digitally
• How is sound recorded

  as an analogue signal (continually changing data) and then converted to digital data
• Sampling

  Process from analogue to digital converters
• How to convert analogue recording to digital data

  sample the amplitude of the wave at regular intervals

  amplitude can only take certain values depending on the bit depth

  Once device sampled the recording, it creates the curve digitally where each block of data matches where each sample was taken
• Why digital data is lost

  not enough samples being taken in certain timeframe
• How to not lose a lot of digital data

  The digital data has lost a lot of data and can be improved by taking samples more regularly (most music is sampled every millisecond)
• Sample rate/sampling frequency(Hz)


  how many samples you can take in a second
• Bit depth

  number of bits available for each sample
• how to get better quality and a closer match to the original recording

  increase sampling rate
• how does a digital file picks up quieter sounds, resulting in closer quality of original recording

  increase bit depth
• increasing sample rate or bit depth will lead to

  increase in file size