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The Transient Perfect Subtractive Delay for Higher Order Crossovers is a utility for calculating a complimentary High Pass response with approximately Linear Phase from a Minimum Phase Low Pass, via a user controlled delay. The use of delay results in higher order high pass filters than would be obtained using the more common Constant Voltage subtractive approach, without delay, based on the same low pass filter. The utility builds standard higher order Bessel, Butterworth, Linkwitz-Riley and Truncated Exponent filter coefficients, and derives a Group Delay from a Low Pass filter. It lets the user select the Low Pass filter type and filter order, adjust the coefficients, and adjust the delay to derive a subtractive High Pass transfer function. It graphs and writes the Magnitude and Phase of the Low Pass and derived High Pass into files in FRD format as a target response template for other acoustic design programs. It also can save a picture of the graph in gif format, and has a Load/Store Librarian for Filter/Delay parameter combination management.

Current Version 1.10    Date: Nov 2002
Copyright - John Kreskovsky 2002

To Download Transient Perfect Designer

(A Self Extracting Archive for Windows containing an Excel Spreadsheet)

Excel File Size 1983 k     -   Download Size 496 K


This version is Free for personal and DIY use only. 

All Rights Reserved. Commercial use prohibited. 
Please contact for licensing information.