Audio+(N4&N5)

Standard file formats for storing audio are:
 * WAV
 * MP3

MP3 vs WAV
Investigate WAV and MP3. Describe how each file format works and explain the difference between them

Sampling
What is sampling?

Explain what is meant by an increased sample rate, and how this can affect the overall sound.

Practical Task
Use a sound editing program to create a short 15 second radio advert. The final sound file should include:
 * a piece of music
 * a downloaded sound effect
 * a sound effect created by the audio program eg fade out, echo

Save the file as WAV and MP3. What do you notice about the file sizes?