Short: Digital FIR filter design software Author: Grzegorz Kraszewski Uploader: Grzegorz Kraszewski Type: misc/sci Version: 2.3 Requires: util/libs/reggae-user.lha Architecture: ppc-morphos >= 1.4 The program purpose is to design digital finite impulse response filters. The design is performed with well known windowing technique. The first step is to design filter frequency response from 0 to fs / 2, where fs is the sampling frequency. This is done graphically. Then designed response is sampled and inverse discrete Fourier transform is performed. The result of the IDFT is then windowed by one of available windows selected by user. In v 1.0 following windows are available: rectangle window, triangle window, Blackman window and Kaiser one (with adjustable beta coefficient in 2.0 - 20.0 range). This windowed IDFT is just a set of filter taps multipliers. DigiFilter performs then DFT to get the real filter frequency response (which differs from the designed one) and displays it. New in 2.3: - Chebyshev window design method. - Fixed a bug in one of custom classes causing troubles with running the program multiple times. New in 2.2: - Oscilloscope-like tracking cursor with attenuation and frequency readout. - Added missing version string and MUI application dercription tags. New in 2.1: - Autoscaling graph grid. - "Aiming" mousepointer when dragging frequency response nodes.