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<title>Spectral Edit Parametric EQ - Audacity Manual</title>
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<h1 id="firstHeading" class="firstHeading" lang="en">Spectral Edit Parametric EQ</h1>
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<div id="siteSub">From Audacity Development Manual</div>
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<div id="jump-to-nav" class="mw-jump">Jump to: <a href="#column-one">navigation</a>, <a href="https://alphamanual.audacityteam.org/man/Spectral_edit_parametric_EQ#searchInput">search</a></div>
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<div class="intro">The <b>Spectral Edit Parametric EQ tool</b> is used with a <a href="spectral_selection.html" title="Spectral Selection">Spectral Selection</a> to apply either a <i><b><a href="glossary.html#band-pass" title="Glossary">band boost filter</a></b></i>, or <i><b><a href="glossary.html#band_stop" title="Glossary">band-cut filter</a></b></i> to the selection.
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<td width="30px" valign="top" align="center"><img alt="Advice" src="../m/images/b/ba/warningicon.png" title="Advice" width="24" height="24" />
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<td align="left" valign="top">Note carefully that when you apply an effect to a <a href="audacity_tracks_and_clips.html#speed" title="Audacity Tracks and Clips"><b>time-stretched clip</b></a> the changed speed of the clip will be automatically <a href="edit_menu_clip_boundaries.html#render" title="Edit Menu: Clip Boundaries"><b>rendered</b></a>.
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<ul><li>If you apply an effect to a selection within a time-stretched clip then Audacity will <a href="audacity_tracks_and_clips.html#split" title="Audacity Tracks and Clips"><b>split the original clip</b></a> so that the selection can be rendered as part of applying the effect.</li></ul>
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<p><b>Accessed by:</b> <span class="menu">Effect > Spectral Tools > Spectral Edit Parametric EQ</span>
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<dl><dd><span title="Spectral Edit Parametric EQ dialog"><img alt="Spectral Edit Parametric EQ 3-5-0.png" src="../m/images/a/ac/spectral_edit_parametric_eq_3_5_0.png" width="330" height="198" /></span></dd></dl>
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<p>Depending on how the track is displayed and what spectral selection has been made, this effect will do one of the following:
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</p>
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<ul><li> When the track is not in <a href="spectrogram_view.html" title="Spectrogram View">Spectrogram View</a> with <a href="spectral_selection.html" title="Spectral Selection">Spectral Selection</a> enabled, an error message will be displayed</li>
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<li> When the spectral selection has a center, upper and lower frequency this effect performs a <i><b><a href="glossary.html#band_stop" title="Glossary">band cut</a></b></i> or <i><b><a href="glossary.html#band_pass" title="Glossary">band boost</a></b></i> 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. </li>
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<li> When either the upper or lower frequency boundary is undefined, an error message will be displayed to that effect. If the lower frequency boundary is 0 Hz there is no center frequency or bandwidth and an error message will state that the lower frequency must be above 0 Hz. </li></ul>
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<div style="margin-top:12px; margin-bottom:12px; margin-left:24px; margin-right:24px">
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<table style="background:#FEFFD0; color:black; border:1px solid #999999; padding-left:12px; padding-right:12px" width="100%" align="center">
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<tr>
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<td width="30px" valign="top" align="center"><img alt="Advice" src="../m/images/b/ba/warningicon.png" title="Advice" width="24" height="24" />
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</td>
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<td align="left" valign="top">Due to a limitation in Nyquist effects, the effect dialog will be displayed before any error message.
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</td></tr></table></div>
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<p><br />
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</p>
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<h2><span class="mw-headline" id="Band_Cut">Band Cut</span></h2>
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<p>In the following example the spectral selection had a center frequency of 2,000 Hz and a bandwidth of 2 octaves. In the Spectral Edit Parametric EQ dialog, the Gain was set to -20 dB.
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</p>
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<dl><dd><span title="hovertext"><img alt="SpectralEditParametric2000Hz-20.png" src="../m/images/2/24/spectraleditparametric2000hz_20.png" width="574" height="367" /></span></dd></dl>
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<h2><span class="mw-headline" id="Band_Boost">Band Boost</span></h2>
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<p>In the following example the spectral selection had a center frequency of 2,000 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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</p>
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<dl><dd><span title="hovertext"><img alt="SpectralEditParametric2000Hz+10.png" src="../m/images/a/a5/spectraleditparametric2000hz_10.png" width="574" height="367" /></span></dd></dl>
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<div align="center"><ul id="f_list"><li>This version created on 2025-12-04 - <a href="https://alphamanual.audacityteam.org/man/Spectral_edit_parametric_EQ">Check current version of this page (development Manual)</a></li></ul></div>
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