[Kst] [Bug 87446] New: Butterworth filters are miss-named.

netterfield at astro.utoronto.ca netterfield at astro.utoronto.ca
Wed Aug 18 18:11:43 CEST 2004

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
           Summary: Butterworth filters are miss-named.
           Product: kst
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kst kde org
        ReportedBy: netterfield astro utoronto ca

Version:           0.99-devel (using KDE 3.2 BRANCH >= 20040204, Mandrake Linux Cooker i586 - Cooker)
Compiler:          gcc version 3.3.2 (Mandrake Linux 10.0 3.3.2-6mdk)
OS:                Linux (i686) release 2.6.3-7mdk

The pass filter plugins are labeled as butterworth filters but they are not.

Butterworth filters are causal, and have a complicated phase vs freq relationship...  See for example http://www-users.cs.york.ac.uk/~fisher/mkfilter/trad.html

The filter used is generally better than a butterworth (being 0 phase and acausal) but the name should be changed.

Perhaps just drop 'buttworth' from the short names, and add '0 phase butterworth' to the description.

More information about the Kst mailing list