Last Updated February 22, 2010

Introduction to Audio

1. How do the amplitude and wavelength of a sound effect the perceived sound?
2. In the context of digitizing sound, what are undersampling errors and quantization errors? Why is 44,100Hz considered a suitable sampling rate for digital music?
3. Identify the differences between undersampling and quantization errors.   
4. What does the Nyquist–Shannon sampling theory tell us about sampling sound?
5. Compare MP3 and WAV sound files.
6. In the context of digital audio, what does “PCM” stand for? What is PCM?
7. What is the difference between lossy and lossless sound formats? Identify advantages and disadvantages. Give an example each of lossy and lossless file format in common use.
8. Identify the sources of error in digitizing audio and suggest how the errors can be reduced.
9. A 12 second audio sample is encoded using stereo PCM, at 16 bits per sample and 44,100 Hertz. How many Bytes of storage will it require?
10. The FMod Audio API handles two type of audio source; samples & streams. What is the difference between these sources? What are the limitations of the two sources?
11. Why is CD quality music sampled at 44100Hz

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