This lesson I played some live radiohead (whose latest album was free to download) to try and get you thinking about capturing sound for digital use. For Higher Computing you need to be able to describe (in a 3 mark way) how sound is captured (microphone), changes into voltage, and is then digitised (by the ADC). You also need to have a good understanding of the terms sampling depth (how many bits are used to measure the analogue signal) and sampling frequency (how often the analogue signal is measured per second).
