| commit | a4b5282f94deea91e4e5271d7ff7f72a8d1f9b6b | [log] [tgz] |
|---|---|---|
| author | Jean-Marc Valin <jmvalin@jmvalin.ca> | Mon Mar 12 11:39:08 2018 -0400 |
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | Mon Mar 12 12:01:45 2018 -0400 |
| tree | 43492d547fc9a62038e740f885ddd69c73cf510e | |
| parent | e1c0770a49f5aad8053c204bb11c7c552020b684 [diff] |
Using a first-order filter for DC rejection A second-order DC rejection filter is uselsss unless we have complex poles. However, complex poles means we have to compute the filter as a single pass (rather than two casdaded first-order filters), which has numerical issues that would require a higher complexity to solve. So rather than waste cycles with a second-order filter (with a longer impulse response), we just go with a first-order filter.