Digital Audio Filter Design and Implementation Utility

by William Mills

Description

Audio filter design is accomplished by graphic placement of poles and zeros on the unit circle using a mouse. Magnitude and phase responses and the specification of the desired filter are graphically displayed together to facilitate interactive filter design. Pole and zero positions on the unit circle and the filter specification are also displayed together.

Filters can be imported from ASCII text files containing their coefficients. Filters can be applied to mono 16-bit wave files, either one at a time or in batches. Filter coefficients can be saved as ASCII text, as a general filter or as a cascaded second-order filter.

Many of the methods used in the program are adapted from Roman Kuc, "Introduction to Digital Signal Processing".

Fully functional shareware for Windows 95 and Windows NT.

Send e-mail to William Mills if you have questions or comments.

Installation

Filter.zip a is compressed zip file which contains subdirectories. After downloading, create a directory for the program (C:\FILTER is recommended) and copy filter.zip to that directory. From DOS, type pkunzip -d filter to uncompress it, or use WinZip. After uncompressing, read the file filter.doc, which contains a complete program description.

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