Fiview is my freeware digital filter design, viewing and comparison tool for Windows and Linux. I developed this as a support tool for developers in the OpenEEG project, to make it easier for people (including me!) to create filters and incorporate them into their apps. Most of the underlying filter-design code was based on mkfilter from Tony Fisher.

The tool generates example C code for all displayed filters, which is efficient and also readable. It also generates example code which can be used to specify filters at run-time, allowing banks of filters to be created easily, or alternatively allowing a tool to adjust to different sampling rates or cut-off frequencies at run-time.

For full details, see the main page HERE.

-- Jim