Introduction to Multimedia

Chapter 8: Audio

Go Online Activities 8.1

8.1 Explore Audio in Multimedia

Introduction:
Explore commonly used audio file formats and the factors that control the quality of audio files.

Directions:
Read the questions below.
Click on the Destination Site link(s) to open a new browser window.
Apply what you learn to answer the questions.
Check your work carefully, and click Submit.

Destination Site: Web3Schools.com: Multimedia Sound Formats
Destination Site: Audacity: Sample Rates

Note: If a link is inactive or to find other Internet sites with similar information, get permission from your teacher to use a search engine.
Here are some keywords you might use:
audio file formats, audio quality, audio sampling rate

1
According to the first destination Web site, what is an advantage of the Real Audio format? A disadvantage?
2
As explained on the first destination Web site, how can you determine the format of a specific audio file? For example, how can a Wave file be identified?
3
As explained on the second destination Web site, why is 44.1 kHz the standard sampling rate for audio CDs?
4
What does the second destination Web site say are three reasons that audio might be recorded at a bandwdith of less than 20 kHz?
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