06-06-2018, 02:50 PM
Audacity quick tip: quickly remove background noise
<div style="margin: 5px 5% 10px 5%;"><img src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise.jpg" width="1821" height="973" title="" alt="" /></div><div><p>When recording sounds on a laptop — say for a simple first screencast — many users typically use the built-in microphone. However, these small microphones also capture a lot of background noise. In this quick tip, learn how to use <a href="https://www.audacityteam.org/">Audacity</a> in Fedora to quickly remove the background noise from audio files.</p>
<p><span id="more-20599"></span></p>
<h3>Installing Audacity</h3>
<p>Audacity is an application in Fedora for mixing, cutting, and editing audio files. It supports a wide range of formats out of the box on Fedora — including MP3 and OGG. Install Audacity from the Software application.</p>
<p><img class="aligncenter size-full wp-image-21394" src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise.jpg" alt="" width="1821" height="973" /></p>
<p>If the terminal is more your speed, use the command:</p>
<pre>sudo dnf install audacity</pre>
<h3>Import your Audio, sample background noise</h3>
<p>After installing Audacity, open the application, and import your sound using the <strong>File > Import</strong> menu item. This example uses a <a href="https://freesound.org/people/levinj/sounds/8323/">sound bite from freesound.org</a> to which noise was added:</p>
<p><!--[if lt IE 9]>document.createElement('audio');<![endif]--><br />
<audio class="wp-audio-shortcode" id="audio-20599-1" preload="none" style="width: 100%" controls="controls"><a href="https://ryanlerch.fedorapeople.org/noise.ogg">https://ryanlerch.fedorapeople.org/noise.ogg</a></audio></p>
<p>Next, take a sample of the background noise to be filtered out. With the tracks imported, select an area of the track that contains only the background noise. Then choose <strong>Effect > Noise Reduction</strong> from the menu, and press the <strong>Get Noise Profile</strong> button.</p>
<p><img class="aligncenter size-full wp-image-21396" src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise.gif" alt="" width="811" height="663" /></p>
<h3>Filter the Noise</h3>
<p>Next, select the area of the track you want to filter the noise from. Do this either by selecting with the mouse, or <strong>Ctrl + a</strong> to select the entire track. Finally, open the <strong>Effect > Noise Reduction</strong> dialog again, and click OK to apply the filter.</p>
<p><img class="aligncenter size-full wp-image-21398" src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise-1.gif" alt="" width="811" height="663" /></p>
<p>Additionally, play around with the settings until your tracks sound better. Here is the original file again, followed by the noise reduced track for comparison (using the default settings):</p>
<p><audio class="wp-audio-shortcode" id="audio-20599-2" preload="none" style="width: 100%" controls="controls"><a href="https://ryanlerch.fedorapeople.org/sidebyside.ogg">https://ryanlerch.fedorapeople.org/sidebyside.ogg</a></audio> </p>
</div>
<div style="margin: 5px 5% 10px 5%;"><img src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise.jpg" width="1821" height="973" title="" alt="" /></div><div><p>When recording sounds on a laptop — say for a simple first screencast — many users typically use the built-in microphone. However, these small microphones also capture a lot of background noise. In this quick tip, learn how to use <a href="https://www.audacityteam.org/">Audacity</a> in Fedora to quickly remove the background noise from audio files.</p>
<p><span id="more-20599"></span></p>
<h3>Installing Audacity</h3>
<p>Audacity is an application in Fedora for mixing, cutting, and editing audio files. It supports a wide range of formats out of the box on Fedora — including MP3 and OGG. Install Audacity from the Software application.</p>
<p><img class="aligncenter size-full wp-image-21394" src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise.jpg" alt="" width="1821" height="973" /></p>
<p>If the terminal is more your speed, use the command:</p>
<pre>sudo dnf install audacity</pre>
<h3>Import your Audio, sample background noise</h3>
<p>After installing Audacity, open the application, and import your sound using the <strong>File > Import</strong> menu item. This example uses a <a href="https://freesound.org/people/levinj/sounds/8323/">sound bite from freesound.org</a> to which noise was added:</p>
<p><!--[if lt IE 9]>document.createElement('audio');<![endif]--><br />
<audio class="wp-audio-shortcode" id="audio-20599-1" preload="none" style="width: 100%" controls="controls"><a href="https://ryanlerch.fedorapeople.org/noise.ogg">https://ryanlerch.fedorapeople.org/noise.ogg</a></audio></p>
<p>Next, take a sample of the background noise to be filtered out. With the tracks imported, select an area of the track that contains only the background noise. Then choose <strong>Effect > Noise Reduction</strong> from the menu, and press the <strong>Get Noise Profile</strong> button.</p>
<p><img class="aligncenter size-full wp-image-21396" src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise.gif" alt="" width="811" height="663" /></p>
<h3>Filter the Noise</h3>
<p>Next, select the area of the track you want to filter the noise from. Do this either by selecting with the mouse, or <strong>Ctrl + a</strong> to select the entire track. Finally, open the <strong>Effect > Noise Reduction</strong> dialog again, and click OK to apply the filter.</p>
<p><img class="aligncenter size-full wp-image-21398" src="http://www.sickgaming.net/blog/wp-content/uploads/2018/06/audacity-quick-tip-quickly-remove-background-noise-1.gif" alt="" width="811" height="663" /></p>
<p>Additionally, play around with the settings until your tracks sound better. Here is the original file again, followed by the noise reduced track for comparison (using the default settings):</p>
<p><audio class="wp-audio-shortcode" id="audio-20599-2" preload="none" style="width: 100%" controls="controls"><a href="https://ryanlerch.fedorapeople.org/sidebyside.ogg">https://ryanlerch.fedorapeople.org/sidebyside.ogg</a></audio> </p>
</div>