Real-world recordings are messy. There's always that random cough, a car honking outside the window, the dreaded phone buzz, or just a stretch of dead air where nothing useful is happening. Deleting these sections is one of the most common audio editing tasks — and it's surprisingly easy when you can see your audio visually.

In this guide, you'll learn how to use the Delete tool in OnlineAudioEdit to remove unwanted sections from any recording. It works just like the Cut tool, but is specifically intended for noise removal workflows.

How Delete Works

The Delete function removes the selected region from your audio and seamlessly joins the remaining parts together. Functionally, it's identical to the Cut operation — the difference is purely semantic. The Delete button is positioned alongside Trim, Cut, and Split as a clear "remove this" action for when you're cleaning up noise or unwanted sections.

Before you delete, the editor will show a confirmation modal to make sure you don't accidentally destroy important audio. This safety feature is especially helpful when editing long recordings where a misclick could remove the wrong section.

Step-by-Step: Deleting Unwanted Sections

1. Import Your Recording

Open the OnlineAudioEdit editor and import your audio file. Drag it onto the waveform area or use the Import button. All common formats (MP3, WAV, M4A, AAC, OGG, FLAC, WEBM, AIFF) are supported.

2. Identify Problem Areas

Play through your recording and note the timestamps of sections you want to remove. In the waveform display, problem areas often look like:

  • Flat lines: Extended silence or dead air
  • Sudden spikes: Loud noises like coughs, door slams, or microphone pops
  • Irregular low bumps: Background noise, room tone, or mouth clicks
  • Consistent patterns: Steady-state noise like fan hum or electrical buzz (consider using AI Noise Reduction for these instead)

3. Select the Section to Delete

Zoom in using the zoom slider to get a clear view of the problematic area. Then click and drag on the waveform to select the exact region you want to remove. The selection will be highlighted, and the duration will appear in the sidebar.

Pro Tip: For sudden noises like coughs or clicks, zoom in to at least 300 px/s. This level of detail lets you identify the exact start and end of the noise, allowing you to remove just the noise without cutting into the surrounding speech or music.

4. Click Delete

Click the Delete button (the red button in the Edit panel). A confirmation dialog will appear asking you to confirm the deletion. Click Delete to confirm, and the selected section is removed instantly.

5. Repeat and Export

Continue identifying and deleting unwanted sections throughout your recording. When you're satisfied with the cleanup, click Export to download the cleaned file as WAV or MP3.

When to Use Delete vs. AI Noise Reduction

It's important to understand when each tool is most effective:

  • Delete is best for removing distinct, isolated sounds — a cough, a phone ring, a car horn, a barking dog, or a stretch of dead air. These are "event" noises that happen at a specific moment in time.
  • AI Noise Reduction is best for removing constant, steady-state background noise — air conditioner hum, fan buzz, microphone hiss, or electrical ground loop. These are noises that persist throughout the entire recording.

For the best results, use both tools together: first, apply AI Noise Reduction to clean up the background, then use Delete to remove any remaining isolated noises.

Common Scenarios

  • Podcast recording: Your guest's dog barked during a key moment — select the bark and delete it.
  • Interview: There's a 30-second tangent that doesn't belong in the final cut — select and delete.
  • Voice memo: The first 10 seconds are just fumbling with the phone — delete the beginning.
  • Music recording: A door slammed during an otherwise perfect take — zoom in, select just the slam, and delete.

Safety Features

OnlineAudioEdit includes several safety features to protect your edits:

  • Confirmation modal: A dialog asks you to confirm before any clip deletion, preventing accidental data loss.
  • Non-destructive editing: Your original file is never modified. All edits happen in the browser's memory.
  • Reset button: Click Reset at any time to restore the original audio and start over from scratch.

Ready to clean up your recordings? Open the OnlineAudioEdit editor and start deleting the noise — keep only the audio that matters.