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EchoFilter - Digital Audio Filtering Software

Digital Audio Filtering Software EchoFilter uses the soundcard of a pc to process audio signals in real-time. The latest version incorporates a powerful programmable audio filter as well as a frequency counter up to 16 kHz with a 8 Hz resolution. The filter bandwidth can go down to 20 Hz and can extract signals and sounds from the audio signal that may normally be close to inaudible. Is can also be used the remove noise and unwanted sounds form the audio signal. The real-time spectrum analyzer and spectrogram gives the user an excellent visualization of the audio. The program also includes an automatic gain control, frequency shifting, graphic equalizer, audio compressor and expander, wave file player and recorder and noise reduction filters.

Software Information System Requirements
  • Windows 9X, NT, ME, 2000, XP, 2003
  • Pentium II CPU
  • 64 MB RAM
  • Sound Card
File Size:1.00 MB
License:Free to try, $40.00 to buy
Screenshot:View Screenshot
Rating :

Features - EchoFilter 3:
  • Adjustable maximum audible frequency range up to 16 kHz (32 KHz sampling rate)
  • Ultra sharp digital filter down to 20 Hz. High pass, low pass, band pass and stop band filters. Non-technical and extremely easy to use.
  • Spectrum analyzer with adjustable resolution and virtual scrollable display. Maximum resolution is 7 Hz.
  • Dominant frequency readout for a 7 Hz resolution frequency counter.
  • Spectrogram with same resolution as the spectrum analyzer. Configurable color palette with continuous color gradient for a very smooth display. The Spectrogram can be scrolled vertically to 2200 pixels. Horizontal length is determined only by available memory and can vary from 3 minutes to 25 minutes (there are 8 lines in a second).
  • Adjustable spectrum and spectrogram windows. Slide one of them away to turn EchoFilter into a spectrum analyzer or spectrogram only application.
  • Real-time frequency shifting (spectral shifting). Make very low and high frequencies hearable.
  • Real-time audio compressor and expander with adjustable threshold and gain.
  • Time averaging (smoothing) of spectrum for the detection of weak signals.
  • Adjustable automatic gain control of input signal.
  • Graphic equalizer. Also functions as a series of adjustable band filters.
  • Wave file recorder and player.
  • Noise reduction filters.
  • Single file 32-bit application.

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