Play your ipod library or hook your microphone up to pass through various types of digital audio filters before going to speaker or headphones. This also demonstrates designing digital audio filters by touch. Select from a variety of filters and set cut-off frequency and rolloff or stopband level.

You can use this app to reduce various interferences or noise in the audio to improve your listening experience
For processing the microphone, you’ll need headphones or headset to avoid feedback noise.

Current free version allows design of Butterworth, Chebyshev, Remez, and Maxflat subband filter types for low-pass filtering in addition to a simple notch filters such as 50 Hertz Notch.

In App purchase allows upgrade to use more filter types as well as enabling band-pass and high-pass filters. In addition background processing of audio is enabled.

Support for combining with other audio apps through the Jack IOS connection kit app.
 

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