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How to Cut and Trim Audio

Cliff Weitzman

Cliff Weitzman

CEO e fundador da Speechify

Gerador de voz com IA nº 1.
Crie narrações com qualidade humana
em tempo real.

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Cutting and trimming a digital audio file may seem like a daunting task for beginners, but once you grasp the fundamental audio cutter workflow, it can be a simple and straightforward process - no matter the video editor.

The video editing tools at your disposal to edit and customize your audio content are many and varied, making this an accessible craft to anyone interested in podcast creation, voice over work, or just basic audio editing.

In this tutorial, we will use Audacity, a powerful open-source audio editor, to illustrate how to cut and trim audio files. Audacity is available for MacOS, Windows, and Linux, making it a highly accessible tool for anyone.

Cutting and Trimming an Audio File

Step 1: Open your audio file with Audacity

Begin by launching Audacity. Then, navigate to "File" on the toolbar and click on "Open." Locate your audio file (such as a WAV or MP3 file) and click "Open." Audacity supports various audio formats, making it a versatile audio editor.

While the menus and the UI might be different across various editors, the concepts will remain the same. Move your playhead, select audio, access the trim tool, and trim your audio.

Step 2: Selecting the audio

Once you've opened your file, you'll see a visual representation of your audio, known as a waveform. Use the selection tool (the I-beam icon) on the toolbar to drag your cursor over the area you want to cut or trim. The selected part will be highlighted. You can zoom in or zoom out for precise selection by using the zoom tool (magnifying glass icon) or pressing Ctrl + 1 (zoom in) or Ctrl + 3 (zoom out) for more precise selection.

Step 3: Cutting the audio

After making your selection, you can cut the audio by going to "Edit" on the toolbar and then clicking "Cut." You can also use the keyboard shortcut Ctrl + X to cut audio. The audio clip you've cut will disappear from the waveform, and the remaining audio will shift to fill the gap.

Step 4: Trimming the audio

Trimming in Audacity allows you to remove unnecessary parts from the beginning or end of your audio file. Using the selection tool, select the part of the audio you wish to keep, then navigate to "Edit" > "Remove Special" > "Trim Audio." This will delete everything outside of your selection.

Trimming Multiple Parts of an Audio in Audacity

Trimming multiple parts of an audio file in Audacity follows a similar process. Select your first segment using the selection tool and then hold down the Ctrl key (MacOS users should use the Command key) to select additional areas. Once you've selected all the parts you wish to trim, follow the same steps as above to remove them.

Trimming Audio Multiple Times

If you need to trim audio multiple times, simply repeat the trimming process. Each time you trim audio, ensure you carefully select the part you want to keep. Remember to use the zoom tool to precisely select the beginning and end points of your audio.

Cutting Part of an Audio Recording

If you wish to cut part of an audio recording instead of trimming, follow the same selection process outlined above. Once you've selected the part of the audio you want to remove, simply use the "Cut" function or press Ctrl + X.

Trimming an Audio File in Audacity

As previously discussed, trimming an audio file in Audacity is straightforward. The main difference between cutting and trimming is that trimming deletes the unselected parts, while cutting removes the selected portion.

Trimming a Single Part of the Audio

To trim a single part of the audio, simply select the part you want to keep and then apply the "Trim Audio" command under "Edit" > "Remove Special."

Trimming the Audio of a Video

If you need to trim the audio of a video, the process is a little different but still manageable. First, you'll need to extract the audio from the video file. There are many tools online that can help you accomplish this, or you can use video editing software that allows audio extraction.

Once you have your audio file, you can follow the same steps to trim the audio as described earlier in this guide. After you've finished trimming, export the audio file (go to "File" > "Export" in Audacity), ensuring it remains in high-quality. You can then use video editing software to replace the original audio in the video clip with your trimmed audio file.

Deleting an Audio File

If you need to delete an audio file entirely, navigate to where the file is stored on your computer (not within the Audacity program), right-click on the file, and select "Delete" or "Move to Trash." Remember, this action will permanently remove the file from your system unless you recover it from the trash or recycle bin before emptying it.

Helpful Tips and Tricks

  • Utilize keyboard shortcuts to improve your workflow. For instance, the spacebar can control playback, allowing you to easily review your edits.
  • Consider using plugins to extend Audacity's functionality. There are many free plugins available that can enhance your audio editing experience.
  • The "Fade In" and "Fade Out" effects can be used to create smooth transitions at the beginning and end of your audio clips.
  • Save your work regularly. Audacity does not auto-save your project, so make sure you save often to prevent any loss of progress.
  • Lastly, have fun! Audio editing can be a creative process, allowing you to customize and enhance your audio content to fit your needs.

As with any new skill, learning to cut and trim audio may take some time, but with patience and practice, you'll soon find it to be a rewarding addition to your digital toolkit. Whether you're looking to edit a podcast, trim a voice over for a video, or simply adjust the length of your favorite song, these tools can help you achieve a professional result

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Cliff Weitzman

Cliff Weitzman

CEO e fundador da Speechify

Cliff Weitzman é um defensor da causa da dislexia e o CEO e fundador da Speechify, o aplicativo número 1 de conversão de texto em fala do mundo, com mais de 100.000 avaliações 5 estrelas e líder de downloads na App Store na categoria Notícias & Revistas. Em 2017, Weitzman foi incluído na lista Forbes 30 under 30 por seu trabalho para tornar a internet mais acessível a pessoas com dificuldades de aprendizagem. Cliff Weitzman já foi destaque em veículos como EdSurge, Inc., PC Mag, Entrepreneur, Mashable, entre outros importantes meios de comunicação.

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Speechify é a principal plataforma mundial de texto para fala, utilizada por mais de 50 milhões de usuários e avaliada com mais de 500.000 avaliações cinco estrelas em seus apps de texto para fala para iOS, Android, extensão para Chrome, aplicativo web e aplicativo para desktop Mac. Em 2025, a Apple premiou o Speechify com o prestigioso Prêmio de Design da Apple na WWDC, chamando-o de “um recurso fundamental que ajuda as pessoas a viverem melhor”. O Speechify oferece mais de 1.000 vozes naturais em mais de 60 idiomas e é utilizado em quase 200 países. Entre as vozes de celebridades estão Snoop Dogg, Mr. Beast e Gwyneth Paltrow. Para criadores e empresas, o Speechify Studio oferece ferramentas avançadas, incluindo gerador de voz com IA, clonagem de voz com IA, dublagem com IA e seu alterador de voz com IA. O Speechify também potencializa produtos de ponta com sua API de texto para fala de alta qualidade e excelente custo-benefício. Em destaque no The Wall Street Journal, na CNBC, na Forbes, no TechCrunch e em outros grandes veículos de notícias, o Speechify é o maior provedor de texto para fala do mundo. Acesse speechify.com/news, speechify.com/blog e speechify.com/press para saber mais.