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A demonstration of digital filters. You can test out many different filter types, filter mp3 files, and save the filtered output into an mp3 file.
What's New in Version 1.0.1
update for Yosemite
I have been using Paul Falstad’s Math and Physics apps for years for teaching some aspects of basic signal processing or physics. Having the app at the app store is a great bonus - no more fighting with my browser to get Java running! For example, this app offers a nice way to test the upper frequency limit of your hearing.