Digital Audio Editing Fundamentals by Wallace Jackson

Author:Wallace Jackson
Language: eng
Format: epub, pdf
Publisher: Apress, Berkeley, CA

Tunneling Into Your Waveform: The Notch Filter

Instead of cutting off the top or bottom sample waveform frequencies, the Notch Filter effect allows you to surgically “tunnel” into any section of your sample to remove a specific frequency or a range surrounding that frequency. As you can see in Figure 8-13, the Notch Filter dialog allows you to specify your target Frequency and Q value, which is the tunnel width around that frequency. Lower Q values make this tunnel smaller, and so a very small Q value essentially targets the frequency with more surgical precision. The default settings are 60 Hz and a 1.0 Q factor, which I need to change to find the frequencies of the remaining chirp artifacts.

Figure 8-13.Select sample, and select Effect ➤ Notch Filter

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