Download Overtone Analyzer - User Manual and Reference Guide

Quickstart Tutorial
Figure 3.13. Adding a Frequency Filter
The grey frame between 200 and 400 Hertz is the Frequency Filter. It will remove all frequencies outside of its
range. Enable looping. Start playback again and hear the effect of the filter. Then, while playback is running, move
the filter up and down by dragging it with the mouse. The Spectrum on the right will show a white outline of the
filtered parts, while the unfiltered (and therefore audible) part is shown in color. You can change the width of the
filter by dragging the red handles that appear when the mouse cursor hovers over the filter.
Now click on Filters → Mute filtered frequencies to invert the filter. Instead of keeping only the frequencies
inside of it, it now punches a hole in the spectrum by filtering out the frequencies inside of it. To see this more
clearly, set the brightness slider on the toolbar to -10 dB, and set the contrast slider to 40 dB. Drag the Frequency
Filter to cover the range from 400 to 700 Hz, so that it removes the second harmonic in the recording:
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