Focusing questions for Web Wizard's Guide to Multimedia Chapter 4: Sound

• Why has sound historically been difficult to use on the web, and what changes have made it more practical?
• What kind (not file format) of sound is used on the web? 
• For what purpose is sound used on the web? 
• How is sound captured for the web? 
• At what rate do people hear sounds? 
• What is MIDI and how does it work?
• Are MIDI files larger or smaller than other sound formats and why? 
• How is sound compressed?