
166 Audio Effects: Theory, Implementation and Application
a. Label the following quantities on each diagram: threshold, ratio,
and knee; i.e., show what aspect of the diagram corresponds to
each quantity.
b. Which curve more closely corresponds to a limiter? Why?
4. Dene two side effects of compression, pumping and breathing. Explain
the difference between them and how they can be addressed.
5. Consider the input signal depicted in Figure 6.14. Draw plots of the
gain over time for both a compressor and an expander (assume a
high ratio for both compressor and expander, and assume the hold
time is zero on the expander), with the following ...