Thomas F. Swezey The Swezey Digital Filter Program

Turn Your PC into a Digital Audio Filter

Newly Upgraded in Spring 2008

Perform Digital Signal Processing (DSP) on virtually any audio source.

The program can accept input from either live real time audio or pre-recorded WAV audio files.
You can capture audio to WAV audio files for later use before or after filtering it.
Employs advanced Digital Signal Processing (DSP) techniques NOT just FIR or IIR band pass filtering.

Loop Antenna

Real time Processing For Shortwave Listening (SWL)

Connect the audio "Line Out" on your shortwave receiver to the "Line In" on your computer's sound card.
Then run the program to digitize the input, filter it and play it out through your computer's speakers in real time.
Can reduce the pumping effect caused by the Automatic Gain Control (AGC) on a signal that is fading in and out.
Removes heterodyne tones ("whistles") and other noise to create a more pleasant listening experience.
To learn more about this feature and hear a short example Click Here!

Digitally Restore Old Phonograph or Tape Recordings.

Phonograph or Talking Machine

Filter pre-recorded WAV audio files or live Line-In audio in real time to reduce crackle, pops and clicks, tape hiss and other types of noise.

Pops and clicks are among the most annoying problems in listening to vintage phonograph recordings. To correct for this I have developed an algorithm in the program that reduces them significantly. To learn more about this feature and hear a short example Click Here!

Auto equalization significantly enhances pre-1925 acoustical recordings. To learn more about this feature and hear a short example Click Here!

Fixed equalization is critical to get the most out of your 78 RPM phonograph records. This feature allows you to set the proper equalization curves for them. To learn more about this feature and hear a short example Click Here!

For some Frequently Asked Questions (FAQ's) about the program Click Here!

Radio Netherlands The program was reviewed in October 1999 on Radio Netherlands Media Network . To learn more and hear the interview Click Here!
Monitoring Times Magazine The program was reviewed in the May 2000 issue of Monitoring Times Magazine . To learn more and read the review Click Here!
Popular Communications Magazine The program was reviewed in the June 2001 issue of Popular Communications Magazine . To learn more and read the review Click Here!

Listen to Samples!

To hear before and after excerpts of recordings processed using this program CLICK HERE!

Try it for Free!

Runs under MS-Windows XP on a PC with a standard sound card.

Download documentation and a FREE DEMONSTRATION COPY of the program CLICK HERE!

Purchase The Program

Your support helps me recover significant development costs and continue my work in this area.

To purchase the SwezeyDsp program CLICK HERE!

New! Audio CDs of Antique Recordings filtered by this program.

This month's featured CD - Acoustical Era Marches (1905 to 1925)
Sousa, Pryor, Goldman and more!
Rousing marches by some of the best bands ever.
All restored from original era recordings.

For more information and to hear short mpeg samples CLICK HERE!

Shortwave Links: (*) Glen Hauser's World of Radio, (*) Monitoring Times Magazine, (*) Popular Communications Magazine, (*) Passport to World Band Radio, (*) Shortwave Magazine, (*) World Radio and TV Handbook (WRTH), (*) Art Bell Coast To Coast, (*) Radio Australia (ABC), (*) BBC World Service, (*) Radio Canada (CBC), (*) China Radio International (RCI), (*) Radio Deutsche Welle (DW), (*) HCJB, (*) Radio Japan (NHK), (*) Radio Netherlands, (*) Radio New Zealand International (RNZI), (*) Radio Prague, (*) Radio For Peace International (RFPI), (*) South African Broadcasting Commission (SABC), (*) Radio Sweden, (*) Swiss Radio International (SRI), (*) Timewave Technology Inc., (*) Vatican Radio, (*) Voice of America (VOA), (*) VOA Communications World (CW), (*) Voice of Russia (VOR), (*) Worldwide DX Club, (*) Worldwide Shortwave Broadcasts, (*) World Radio Network (WRN)
Phonograph / Talking Machine Links: (*) Online Discographical Project, (*) Association for Recorded Sound Collections (ARSC), (*) Internet Archive (78 rpm), (*) Internet Archive (Cylinders), (*) Library of Congress, (*) British Library Sound Archive, (*) Canadian Antique Phonograph Society, (*) Virtual Gramophone, (*) Library of Cylinder Recordings, (*) City of London Phonograph and Gramophone Society, (*) Michigan Antique Phonograph Society, (*) Edison National Historic Site, (*) Cylinder Preservation and Digitization Project, (*) tinfoil.com, (*) Honkingduck, (*) All That Jazz, (*) Antique Phonographs, (*) meloware, (*) DAK, (*) Tracer Technologies, (*) EnhancedAudio.com, (*) audio-restoration, (*) Audio Restoration and Cassette Repair services, (*) Bill's 78rpm Record Home Page, (*) Kiddie Rekord King, (*) Collectors World West, (*) Hawthorn's Antique Audio, (*) World of Gramophones, (*) phonophan, (*) Victrola Repair Service, (*) Mainspring Press, (*) Hit of the Week, (*) Red Hot Jazz Archive, (*) Brown's Antique Phonographs, (*) phonographs.org, (*) Edison Shop, (*) Vintage 78s, (*) Intertique, (*) 78rpm Record Home Page, (*) Victor Record Catalogs, (*) Turtle, (*) Phonozoic
Other Links: (*) Bay Area Kicks, (*) Mexico Vacation Packages

Thank You for your interest!

Just for "kicks" visit my personal web site Click Here!

Your comments are always welcome. Please e-mail me at swezeyt@winternet.com

To view the product disclaimer Click Here!

"Making the WORLD sound better one PC at a time!"

"Make Your Old Records Sing!"

(c) 1999-2007, Thomas F. Swezey. All rights reserved.