# AI audio fixer: repair damaged voice recordings

Salvage rough speech recordings when several audio problems ruin a take at once.

Powered by [Audio enhancer](https://audo.ai/audio-enhancer.md) — tuned for multi-problem speech salvage.

## How it works

1. Upload the damaged voice track, call export, or video recording.
2. Keep Repair strength at Full repair for compound damage, or slide toward Gentle to retain more raw mic texture.
3. Audition the salvaged take against your source, then download the repaired file.

## Salvage jobs where stacking single-purpose filters fails

When room bounce, HVAC rumble, a cheap webcam capsule, and heavy compression stack on one recording, repairing speech in a single pass avoids watery filter artifacts.

### Compound speech damage: Fix audio online when echo, noise, and a bad mic collide

Running a spectral denoiser, a de-reverb plugin, an equalizer, and a compressor one after another compounds phase smear until the speaker sounds metallic and underwater. When you fix audio online in a single generative pass, all four flaws clear together cleanly.

### Codec & bitrate grit: AI audio repair for swirly low-bitrate MP3 and Opus archives

Old 32 to 64 kbps webinar exports, re-saved screen captures, and compressed messaging voice notes chew upper frequencies into watery digital swirl. Use AI audio repair to replace mangled codec artifacts with clean 48 kHz consonant definition.

### Robotic call recordings: Rescue over-denoised Zoom, Teams, and Discord exports

Aggressive live noise suppression in meeting apps often clips the start of words and leaves remote guests sounding hollow or gated. Rebuilding vocal body on the saved MP4 or M4A makes the recording pleasant to share before running Meeting recording shortener or Interview transcription.

### Wrong input & field takes: Salvage client interviews recorded on the wrong microphone

Discovering after a guest logs off that your recorder captured the laptop's internal mic instead of your XLR studio mic used to mean scrapping the episode. See how single-pass voice rebuilding compares with traditional noise reduction in best AI noise removal tools.

## Why single-pass voice repair beats chaining four separate filters

Audo's AI audio fixer uses Audio enhancer to salvage damaged speech in audio (WAV, MP3, M4A, AAC, FLAC, OGG, Opus, WebM, AIFF) and video (MP4, MOV, MKV, WebM, AVI) tracks up to 10 GB without an account (up to 10 hours signed in), processing the first minute of each file free, 3 times a day, with no sign-up. Expect results in about 8 seconds for 1 minute, about 38 seconds for 20 minutes, and under 2 minutes (about 1 minute 42 seconds for audio) for a full 1-hour session.

In a traditional editing chain, each filter inherits the mistakes of the one before it: a noise reducer leaves chirping residue on reverberant tails, a de-reverb smears that residue, and makeup compression pulls every artifact right back up to full volume. Rather than subtracting flaws layer by layer, Audo reads the speaker's underlying phonetics, pitch contour, and timing to synthesize a clean 48 kHz studio track leveled to −16 LUFS.

Because people search to fix audio for very different problems, check the diagnostic table below before running a long file. Leave Repair strength at Full repair for compound speech damage, or pull toward Gentle to blend back original mic character. When two clean mics simply play at unequal volumes, use Audio leveler; when only steady fan noise sits behind a good studio mic, use Remove noise; when music plays under dialogue or in a song, use Remove music from video or Vocal remover; and note that lip-sync timing drift or unreadable corrupted file headers cannot be fixed here.

Diagnostic guide: what AI audio fixer repairs vs. non-speech file issues

| What is wrong with the recording | Repaired here? | What to do |
|---|---|---|
| Echoey room + noisy HVAC + thin webcam or phone mic at once | Yes — rebuilt in one pass at 48 kHz | Keep Repair strength at 80–100% (Full repair) |
| Watery 64 kbps MP3/Opus warble or gated Zoom call artifacts | Yes — replaces codec swirl with clean vocal harmonics | Run Repair strength at 70–100% |
| Loud host and quiet guest on otherwise clean microphones | Partial — sets overall −16 LUFS, not per-speaker turn gain | Use Audio leveler to match speaker turns within 15 dB |
| Songs, musical instruments, or background video scores | No — speech model strips music and singing | Use Remove music from video or Vocal remover instead |
| Out-of-sync video lip-sync or broken unplayable .mp4/.wav headers | No — preserves source timing and requires a valid media stream | Slip audio offset in a timeline editor or repair missing container headers first |

Tool: Enhance voice (`enhance_voice`). The same tool's other pages: https://audo.ai/audio-enhancer.md, https://audo.ai/remove-echo.md, https://audo.ai/audio-cleaner.md, https://audo.ai/voice-cleaner.md, https://audo.ai/video-audio-enhancer.md, https://audo.ai/fix-muffled-audio.md, https://audo.ai/fix-distorted-audio.md, https://audo.ai/podcast-audio-enhancer.md, https://audo.ai/mic-enhancer.md. Price: 5 credits a minute — $0.05/min ($3.00/hr), pay-as-you-go with no monthly subscription — of input for whole files, charged only when a job succeeds.

## Free API

```bash
curl -F file=@panel-webinar.mp4 https://audo.ai/api/try/enhance-voice -D response.headers -o response.body
```

Read response.headers and response.body before naming media. Handle 202, 200 JSON and errors with the complete response client at https://audo.ai/docs/api?utm_source=markdown&utm_medium=agent#responses.

Free for the first minute of each file, 3 times a day per person, with no key or account. Uploads up to 10 GB, 2 at once from one address. The response is the result itself; a job that runs longer than about 30 seconds returns 202 with a link to check on it. With an API key (`-H "Authorization: Bearer $AUDO_API_KEY"`), omitting free runs the full job with credits if the balance covers it, otherwise the free allowance if quota remains. Set free=true to prohibit spending; for paid runs use free=false with an approved positive max_credits. A free result cut short comes with finishUrl (and the Audo-Finish-Url header when the response is the file itself): give it to the person, who pays there (from $5, no sign-up), and the whole file runs; keep checking the status link, whose finishedBy names the whole-file job and its own status link. Details: https://audo.ai/docs/api.md

## Options

Form fields with the same names as the MCP tool's inputs:

- `noise_reduction`: How much of the regenerated voice to use, as a percentage. 100 uses all of it; lower values mix back some of the original sound. Default 100.
- `auto_volume`: Sets the whole file to -16 LUFS with one gain, and limits peaks to -1 dBTP. It doesn't balance loud and quiet speakers. Default true.
- `output_format`: The result's format: same (as the input; a video stays a video), wav, mp3, m4a, or flac. Default same.

## Languages

Any language: it works on the sound, not the words.

## From an assistant (MCP)

Add https://audo.ai/mcp and sign in (setup for each assistant: https://audo.ai/setup.md). The tool is `enhance_voice`:

> Regenerates speech: removes echo, noise, and distortion, and restores muffled, phone, or low-quality voices. Then sets the file to -16 LUFS. Made for voices: music and other sounds are removed too. Works on video. Use it for echoey, phone, low-quality, or damaged recordings. Not for plain background noise when the voice is fine (remove_noise keeps the real voice). It costs 5 credits a minute, charged only if the job succeeds. Returns the result with download links, or job_id for get_job if it takes longer.

Example: "Use Audo to fix the bad audio in panel-webinar.mp4."

## Questions

**Can I use Audo's AI audio fixer for free?** Yes. Audo repairs the first minute of each damaged audio or video file free, 3 times a day, with no sign-up. Salvaging full-length files costs $0.05 a minute ($3.00 an hour), paid only as you go with no subscription — see pricing.

**How do I fix bad audio in a recording or video when several things went wrong?** Drop your audio or video file into Audo's AI audio fixer, set Repair strength between Full repair and Gentle, and download the salvaged recording. Instead of stacking separate denoise, EQ, and de-reverb plugins, Audo rebuilds clear 48 kHz speech and levels loudness in one step.

**Can this fix corrupted audio files that won't play, or out-of-sync video?** No. Audo's AI audio fixer repairs rough speech quality inside playable media files — it cannot reconstruct missing MP4 moov atoms on an interrupted recording that refuses to open, nor does it shift audio timestamps to fix lip-sync drift against a camera track. To inspect whether a file's streams and codecs are readable, run Audo's Media info for free.

**Does AI audio repair clean up codec warble on old MP3s and messaging clips?** Yes. Heavy lossy compression at 32 to 64 kbps discards upper frequency bins, creating metallic swirl around s and sh sounds. Audo's AI audio fixer rebuilds the voice at 48 kHz, replacing that digital grit with smooth, natural consonants.

**What if one speaker in my recording is much quieter than the other?** Audo's AI audio fixer repairs vocal tone and normalizes the overall file to −16 LUFS, whereas large volume gaps between a loud host and a quiet guest are best matched turn by turn in Audo's Audio leveler (which adjusts individual voices by up to 15 dB). You can run one right after the other.

**Why did background music or sound effects vanish when I ran Fix audio?** Because Audo's AI audio fixer reconstructs spoken voices alone, music beds, jingles, applause, and ambient foley are stripped out. To remove background music while keeping footsteps and sound effects in a video, use Remove music from video; to remove one specific sound such as a dog bark, use Audo's Sound remover.

**Can ChatGPT, Claude, or coding agents fix audio files automatically with Audo?** Yes. Connect Audo over MCP so ChatGPT, Claude, Claude Code, or Cursor can repair damaged speech recordings directly from chat, or automate batch salvage scripts through the noise removal API. Add Audo to your assistant once to set it up.

## More

- Every tool: https://audo.ai/llms.txt
- OpenAPI: https://audo.ai/api/openapi.json
- This page for people: https://audo.ai/audio-fixer?utm_source=markdown&utm_medium=agent