Features - EchoFilter 3

1. Adjustable maximum audible frequency range up to 16 kHz (32 KHz sampling rate)
2. 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.
3. Spectrum analyzer with adjustable resolution and virtual scrollable display. Maximum resolution is 7 Hz.
4. Dominant frequency readout for a 7 Hz resolution frequency counter.
5. 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).
6. Adjustable spectrum and spectrogram windows. Slide one of them away to turn EchoFilter into a spectrum analyzer or spectrogram only application.
7. Time averaging (smoothing) of spectrum for the detection of weak signals.
8. Adjustable automatic gain control of input signal.
9. Real-time frequency shifting (spectral shifting). Make very low and high frequencies hearable.
10. Real-time audio compressor and expander with adjustable threshold and gain.
11. Graphic equalizer. Also functions as a series of adjustable band filters.
12. Wave file recorder and player.
13. Noise reduction filters.
14. Single file 32-bit application.

• For more information on these features, see the EchoFilter functions in the online manual.
• See the examples page for screen captures.