Spectral edit parametric EQ - Audacity Manual

# Spectral edit parametric EQ

### From Audacity Manual

The Spectral edit parametric EQ tool is used with a Spectral Selection to apply either a band boost filter, or band-cut filter to the selection.

Accessed by: Effect > Spectral edit parametric EQ...

Depending on how the track is displayed and what spectral selection has been made, this effect will do one of the following:

- When the track is not in spectrogram or spectrogram log(f) view an error message will be displayed
- When the spectral selection has a center, upper and lower frequency this effect performs a band cut or band boost according to the value entered in the "Gain (dB)" control. The center frequency is defined by the center frequency of the spectral selection and the bandwidth is defined by the upper and lower frequencies of the spectral selection.
- When either the upper frequency border is at the Nyquist frequency or the lower frequency border is at 0 Hz, an error message will be displayed.

| Due to a limitation in Nyquist effects, the effect dialog will be displayed before any error message.

## Examples

### Band Cut

In the following example the spectral selection had a center frequency of 2000 Hz and a bandwidth of 2 octaves. In the Spectral edit parametric EQ dialog, the Gain was set to -20 dB.

### Band Boost

In the following example the spectral selection had a center frequency of 2000 Hz and a bandwidth of 2 octaves. In the Spectral edit parametric EQ dialog, the Gain was set to +10 dB.

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