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AudioTag is a web-based music recognition service for identifying an unknown song from an audio or video file. Upload a clip, complete the human-verification step, and AudioTag searches its acoustic-fingerprint database for matching recordings. Results can include the track title, artist, album, and candidate matches.
It is useful when you have a song saved as an MP3, a short recording from a phone, or a video containing music. It is less useful for identifying a cover, a live reinterpretation, or a different song with a similar melody, because AudioTag matches characteristics of the recording itself rather than musical similarity.
How to identify a song with AudioTag
- Open front.audiotag.info.
- Select Upload and recognize from file.
- Choose an audio or video file from your device.
- Follow the page sequence: upload file → prove you’re a human → get result.
- Review the identified title, artist, album, and any alternative matches.
The current homepage recommends an audio segment of 15–45 seconds. AudioTag can process a longer upload, but its web uploader analyzes only up to five minutes from the beginning of the file. If the music starts later than that, trim the file first.
Which files does AudioTag accept?
AudioTag’s FAQ says the web service accepts almost any common media format, including WAV, MP3, OGG, FLAC, FLV, AMR, and MP4. It can recognize audio inside a video file, so you do not necessarily need to extract the soundtrack before uploading it.
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| Situation | Recommended approach |
|---|---|
| Music is clearly audible | Upload a 15–45-second section containing the song, not a long silence or spoken introduction. |
| The file is a video | Upload the MP4 or other supported video directly. |
| The song begins several minutes into a recording | Trim the file so the music is within the first five minutes, preferably near the beginning. |
| The clip is noisy | Try another section with louder, less distorted music. |
Choosing a clip that can be recognized
A short recording is not automatically a good recording. AudioTag needs enough representative audio to create a useful fingerprint. A clip containing a clear chorus, verse, or instrumental passage usually has a better chance than one containing applause, speech, a ringtone, or heavy background noise.
The FAQ also mentions a separate optimal-duration figure of 10–30 seconds, while the current homepage displays 15–45 seconds. For the present web interface, use the homepage guidance: start with a clear 15–45-second clip. A complete song is unnecessary and can be counterproductive. AudioTag’s API documentation says that sending an entire track uses more server resources or API credits even though a shorter fragment is normally enough.
Can AudioTag recognize a YouTube link?
Not currently. The direct-link page at audiotag.info/xlink currently shows “Temporary closed for maintenance”. It says recognition from YouTube video links has been temporarily disabled because of high server load.
When the feature is available, the path is Recognize from direct link → Enter link. For now, do not rely on older instructions claiming that pasting a YouTube URL will work. If you have permission to use the content, download or export a suitable clip and use the file-upload page instead.
How AudioTag finds a match
AudioTag extracts an acoustic fingerprint from the uploaded recording and compares it with fingerprints in its database. The service currently reports more than 47 million tracks, over 11 million albums, and more than 2.3 million artists; these figures are displayed dynamically and can change.
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This process is different from asking whether two songs sound musically alike. AudioTag is designed to match substantially the same recording. A cover version, a live performance, a remix, or a song that merely uses a similar melody may not produce the expected result. The service says its engine is designed to tolerate some noise, distortion, and speed variation, but no fingerprinting system identifies every recording correctly.
AudioTag can also detect multiple songs in one recording. When it does, the result can include the time intervals for the detected fragments.
What to do when AudioTag returns no result
- Use a more informative section. Replace an intro with a chorus or a clearly audible verse.
- Make the clip longer. A very short or noisy sample may not contain enough fingerprintable material.
- Move the music to the beginning. The web uploader analyzes only the first five minutes.
- Try the original recording. A recording of a speaker playing a song through a small speaker may be harder to match than the source file.
- Check the file itself. Play it locally and confirm it contains audible audio rather than silence, a corrupt stream, or unsupported data.
- Try another part of the song. Different sections can produce different fingerprint quality.
If the result page says “You didn’t upload any audio file or your session time has expired”, return to the main page and start again. This message means the upload is missing from the current session; it does not identify a problem with the song.
AudioTag for developers: API basics
AudioTag offers an API for commercial use and provides a free allowance of three hours of audio per month before payment is required. An account and active API key are required.
File recognition uses the identify action. The request returns a job token, not the finished answer. Use get_result with that token and poll until the job reports wait, found, or not found. The token and associated recognition data remain valid for six hours after the job is created.
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The documented native format is a mono, 16-bit PCM RIFF WAV sampled at 8 kHz. AudioTag documents this FFmpeg conversion command: ffmpeg -i input_file.ext -ar 8000 -ac 1 -vn coverted.wav. The output filename is spelled “coverted.wav” in the documentation. The API also lists formats such as MP3, MP4/M4A, FLAC, OGG, OPUS, WAV, WMA, AMR, ALAC, AIFF, 3GP, and 3GPP.
A file-upload request must use multipart/form-data and include apikey, action, file, start_time, and time_len. The documented API limits are a minimum duration of five seconds and a maximum upload size of 100 MB. This Python example shows the required fields; replace the example values with the desired start time and audio duration:
import requests
filename = ‘gazebo_12s.wav’
api_url = ‘https://audiotag.info/api’
apikey = ‘YOUR_ACTIVE_API_KEY’
payload = {‘action’: ‘identify’, ‘apikey’: apikey, ‘start_time’: 0, ‘time_len’: 12}
with open(filename, ‘rb’) as audio_file:
result = requests.post(api_url, data=payload, files={‘file’: audio_file})
print(result.text)
For a remotely hosted file, the API uses identify_offline_stream, followed by get_result_offline_stream. The URL must be publicly accessible over HTTP or HTTPS. The documented remote-file limits are a minimum duration of 12 seconds and a maximum size of 5,000 MB.
Common API errors
| Error condition | Likely fix |
|---|---|
| Invalid or inactive API key | Check the key in the account and make sure it is active. |
| Unsupported format or invalid extension | Convert the file to a supported format and use the correct filename extension. |
| Zero-size, malformed, or non-audio input | Play the file locally, re-export it, or convert it with FFmpeg. |
| File too large | Trim or recompress the file to stay below 100 MB. |
| Remote download failure | Use a public, working HTTP(S) URL; private cloud links and login-protected URLs may fail. |
| Insufficient balance | Check the account’s remaining API allowance or billing status. |
Privacy and usage considerations
The web service is free for non-commercial use. Commercial use is supported through the API. Before uploading material, read AudioTag’s current terms: they state that content shared through the service may be stored in its database permanently and that the uploader grants AudioTag broad rights to use content posted through the platform.
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That makes the service unsuitable for confidential recordings, unreleased music, private conversations, or material you are not authorized to upload. If privacy matters, remove unrelated audio, trim the sample to the smallest useful section, and confirm that you have permission to submit it.
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The site navigation also includes Add music into DB, Latest music discoveries, Browse music videos, Time machine, Radio monitor, and Recently added music. These are discovery and catalog features rather than replacements for the main upload workflow. For a one-off identification, start with Upload & recognize music file.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.FAQ
Is AudioTag free?
Yes, AudioTag is free for non-commercial use. The service offers an API for commercial use, with a currently advertised free allowance of three hours of audio per month.
What is the best AudioTag clip length?
The current homepage recommends 15–45 seconds. Use a clear, audible section with music rather than silence, speech, or background noise. The FAQ contains older 10–30-second guidance, so the homepage wording is the better guide for the current uploader.
Does AudioTag recognize songs from YouTube?
YouTube-link recognition is currently unavailable. The direct-link page says the feature is temporarily closed for maintenance because of high server load.
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Can AudioTag identify a cover version?
It may identify a cover if that particular recording is in its fingerprint database, but it is not designed to identify a song solely from a similar melody. Its matching is based on acoustic characteristics of the recording.
Why did AudioTag fail to recognize my file?
The clip may be too short, noisy, distorted, or acoustically uninformative. Try a 15–45-second section with clearer music, place the relevant part near the beginning, and verify that the file plays correctly.
Does AudioTag analyze the entire song?
The web uploader analyzes up to five minutes from the beginning of an upload. A complete song is unnecessary; a shorter representative clip is normally more efficient.
The Bottom Line
AudioTag is a straightforward option for identifying music from a local audio or video file. For the best chance of success, upload a clear 15–45-second clip, keep the music within the first five minutes, and try a different section if the first attempt fails. Do not assume that older YouTube-link instructions still apply, and avoid uploading confidential or unreleased material because the service’s terms allow submitted content to be stored and used broadly.
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