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audo

Audio enhancer

Make any recording sound studio-quality with Audo's AI voice enhancer.

FixesNoiseEchoMuffled soundDistortion

10M+ files processed since 2021

Full

From subtle to full.

More options

Free for the first minute, 3 times a day. No sign-up.

Made for voices. Music and other sounds are removed too.

Hear the difference

Play Original, then Enhanced.

Enhanced fixes the muffled sound and noise.

Made with Audio enhancer

Works in any language

  • Hello
  • こんにちは
  • Hola
  • 안녕하세요
  • Bonjour
  • नमस्ते
  • Hallo
  • 你好
  • Ciao
  • مرحبا
  • Olá
  • Привет
  • Hoi
  • สวัสดี
  • Merhaba
  • Γεια σας
  • Xin chào
  • שלום
  • வணக்கம்
  • Kia ora

How to improve audio quality

  1. 1

    Add a recording or a video.

  2. 2

    Keep it at full strength, or turn it down.

  3. 3

    Listen, then download the enhanced file.

How it improves audio quality

Audo's AI audio enhancer and voice enhancer takes audio (WAV, MP3, M4A, AAC, FLAC, OGG, Opus, WebM, AIFF) and video (MP4, MOV, MKV, WebM, AVI), up to 100 MB without an account, and the first minute of each file is free, 3 times a day, with no sign-up. One minute of audio usually takes about 11 seconds, and a 20-minute recording about 45 seconds.

Because it rebuilds the voice, even phone calls and cheap microphones come back clear and full. The examples above are real recordings with real problems: a phone call, a podcast on a cheap mic, a lecture hall, a windy backyard, and a walkie-talkie.

Pick Remove noise instead when the voice is fine and only the background is noisy: it keeps the voice exactly as recorded. Both work on video, and both finish at a standard volume. A clearer voice also makes a better transcript: Interview transcription labels who said what.

Questions

Is there a free audio enhancer?

Yes. Audo's AI audio enhancer is free for the first minute of each file, 3 times a day, with no sign-up. Whole recordings run $0.03 a minute ($1.80 an hour), with no subscription — see pricing.

What does it fix?

Background noise, echo, muffled sound, and distortion, all at once. Audo's voice enhancer is made for speech: calls and cheap microphones come back clear and full, as if recorded on a good microphone in a quiet room.

Will it make my voice sound robotic?

At full strength it can sound a little different from the original, because it rebuilds the voice rather than filtering it. To keep more of your own sound, turn Strength from Full toward Subtle: it mixes some of the original back in. The examples above show what it does.

What if I only want background noise or chatter removed, without changing my voice?

Use Voice isolator or Remove noise instead. Audio enhancer rebuilds the voice to fix echo and muffled sound, while Voice isolator only strips out background noise, music, and chatter and keeps your voice untouched.

How do I improve the sound of an iPhone video?

Open this page in your iPhone's browser, add the video, and download it again with the enhanced sound. The picture stays as it was. Without an account, videos up to 100 MB work; signed in, up to 10 GB.

Does it work on video?

Yes. It's an audio enhancer for video too, for MP4, MOV, MKV, WebM, AVI files. You get the same video back with the enhanced sound.

Can I use it on music or singing?

No. It's made for speech, so music and other sounds are removed. It isn't a vocal enhancer for songs. To remove background music behind someone speaking while keeping their own voice, use Remove music from video.

Which languages does it work in?

Every language: it improves how a voice sounds, whatever words are said.

More tools

All tools

For AI assistants and developers

Ask ChatGPT, Claude, or a coding agent to do this for you, or call it from your own code. When an agent's free result is cut short, it gives you a link to finish the whole file, no sign-up.

Show the free API call
Free API · no key
curl -F file=@voice-note.m4a https://audo.ai/api/try/enhance-voice -D response.headers -o response.body