Loop Antenna

The Swezey Digital Filter

Realtime Audio Filtering For Shortwave Listening (SWL)

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


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.
Removes heterodyne tones ("whistles") and other noise to create a more pleasant listening experience.
The program lets you capture the raw audio input and/or the filtered audio output to WAV files.

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!

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

Thank you for your interest in the Swezey Digital Filter Program!

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(c) 2009, Thomas F. Swezey. All rights reserved.