An expander is in a way the opposite of a compressor. While a compressor uses the threshold setting to reduce the signal above the set value, an expander reduces the signal below the threshold value. This makes the signal more dynamic, and is thus expanded instead of compressed.

As with most audio tools, the parameters can vary between expanders. Typical controls found are ratio, threshold, knee, range and attack.

Originally posted on May 4, 2011 @ 12:25 am