Remove static, clicks and pops from a recording

Save the original separately and work on a copy. Choose a short section containing the fault and some of the speech around it. Keep an untreated copy of that same section so you can compare each test and undo an unhelpful change.

For casework or another important recording, keep the complete original, the processed version and notes about what you changed. Preserve the content and timing. Don't delete or mute a passage to hide a fault, or replace unclear speech with words you think belong there. Restoration doesn't establish what was said or whether a recording is admissible.

If you're considering an online processor, check how that particular provider handles uploaded recordings before sharing sensitive material. A local editor lets you make a test without uploading the file. Media Medic's enquiry can begin with a description of the problem; discuss file-handling requirements before sending identifying material.

Listen to the same moment more than once. If practical, play the saved file in another player or on another device. A fault that repeats at the same point is a reason to inspect the file. A noise heard only on one playback setup needs investigation there before you change the recording. This check helps narrow the problem; it doesn't identify its cause by itself.

Rapid, soft crackle can be less straightforward. Audacity notes that its Click Removal effect may not handle this well; noise reduction may be a better test. Let the audible result guide you rather than the name of the effect.

Audacity provides a built-in Click Removal effect. Its official click-removal guide describes the controls; the menus below follow that documentation.

1. Open your working copy and select a representative section containing clicks and surrounding wanted audio.
2. Go to Effect → Noise Removal and Repair → Click Removal.
3. Start with the default controls and use Preview. Listen to the voice as closely as the clicks.
4. Adjust Threshold or Max Spike Width cautiously if the preview still contains the fault. Change one control at a time so you can hear its effect.
5. Apply a useful test, compare it with the untreated section and undo it if the wanted sound becomes less clear.

A lower threshold detects softer clicks, but a setting that's too low can falsely identify wanted audio. A spike-width setting that's too large can also damage the sound. There is no setting that fits every recording.

Adobe Audition's DeClicker and other repair plugins provide alternative controls. Having another tool available doesn't remove the need to preview, compare and check for damage. Avoid running repeated stronger passes simply because some clicks remain.

A single small disturbance may suit Audacity's Repair effect. Zoom in, select the short faulty interval and use Effect → Noise Removal and Repair → Repair. Check the speech immediately before and after it.

Selection size matters. Audacity's Click Removal manual says Click Removal requires more than 4,096 samples, while Repair works on selections up to 128 samples. These are samples, not milliseconds. At 44,100 Hz, 128 samples is about three milliseconds.

If Click Removal says its algorithm wasn't effective, that doesn't prove the recording has no clicks. The selection or the type of fault may be outside what the effect can handle. Try a suitable selection or a different bounded repair; don't enlarge a destructive edit until it takes part of a word with it.

For a steady noise, Audacity's Noise Reduction manual describes a separate process. It needs an actual section containing only the noise you want to reduce.

1. Select a noise-only section. Don't include speech in the noise profile.
2. Open Effect → Noise Removal and Repair → Noise Reduction, then choose Get Noise Profile.
3. Select the short section you want to test and reopen Noise Reduction.
4. Preview a modest reduction. Use the lowest amount that makes the noise acceptable while preserving the wanted sound.
5. Try Residue to hear what would be removed. Recognizable pieces of the voice there are a reason to reduce the settings and compare again.

Switch back to Reduce before applying a result you want to keep. If there is no suitable noise-only section, don't teach the effect that the speaker is noise. Very loud or changing noise, or noise occupying the same frequencies as speech, may prevent a satisfactory result.

Compare the same phrase in the untreated and processed copies at a similar listening volume. Listen for complete words, consonants, breaths and other details you need. A click disappearing isn't enough if the repair also changes a syllable.

Undo or reduce processing if the voice becomes smeared, thin, choppy or watery. Leaving some noise can be more useful than removing part of the recording. Don't judge the result only by a smoother-looking waveform or a quieter pause.

Export a separately named result and listen to that file too. Keep it alongside the original rather than replacing it. If the sound belongs to a video or several synchronized tracks, check that the timing still matches. Saving an MP3 as WAV doesn't restore detail already lost from the source.

Stop when each stronger pass removes wanted sound, the fault overlaps an important word, or you can't tell what an edit changed. Equalization can reduce a frequency range, but it also affects wanted sound in that range; it isn't a universal cure for clicks or static.

A tool can work with what was recorded. It can't establish missing words from a noisy gap. Keep an uncertain passage uncertain and seek a file-specific assessment if it matters to your work.

If you can record again, make a short test before the full session. Check connections, recording levels and microphone placement. Investigate buffer or driver issues when the recording system produces clicks, and use an appropriate pop filter or microphone position for plosive thuds.

These checks concern a future capture. Return to the saved-file tests above when the recording cannot be made again.

Still can't follow the part that matters? Media Medic offers a free file review. An audio engineer listens to assess whether restoration can improve the recording before an invoice is sent for the work.

Tell us where the sound becomes difficult, which moments matter and what processing you've already tried. Keep the original and any earlier processed versions. You can raise file-handling requirements without attaching sensitive material to the initial enquiry.

Request a free file review

For more about the service and its limits, see our audio forensic service. You can also explore the other recording guides.