Assess a long mix before you share it
Upload a recording and get a timestamped report of speech, singing, noise, silences and sudden level changes. Play any marked moment from your own file.
- Free, with no account
- Checked on FocusDen’s own server
- Guest audio deleted 7 days after the check
Getting the assessment tool ready…
What you get back
A report with one time rail across your recording. Each mark has its timestamp, its basis and a confidence, and plays from your own file.
- Speech
- Singing
- Unresolved voice
- Noise-like sound
- Level change
- Silence
- Level shift
- Near full scale
Checked against
- At least 30 minutes
- No vocals or speech
- No sudden drops
- Low distraction
- Consistent volume
Each criterion reads Meets, Does not meet, Needs review or Not checked, with the evidence behind it. Download the whole report as JSON.
How it works
- Add one fileDrag it in or choose it: WAV, MP3, FLAC, OGG, Opus, M4A, MP4 or AAC, up to 512 MB. Name it and confirm you are entitled to provide it.
- FocusDen checks itIt listens for speech, vocals, noise and level changes. You can leave the page while it runs.
- Hear what it foundPlay each marked moment from your file, read the criteria and download the report as JSON. A private return link opens it on another device.
How a report reads
Every finding sits on one time rail. Select a mark in your report to hear it.
| Mark | What it marks | How it is found |
|---|---|---|
| Speech | Spoken words, wherever the speech detector finds them in the decoded audio. | Voice activity detection, then a transcription model running on FocusDen’s server. |
| Singing | A voice carrying a melody, with or without clear words. | Vocal separation on 30-second windows. Long recordings are sampled, and the report says how much was covered. |
| Unresolved voice | Something voice-like that produced no words, for further listening. | Voice activity without a transcript, or a separated vocal without words. |
| Noise-like sound | Broadband texture such as hiss, rain, wind or crowd. It may be deliberate. | Spectral flatness, second by second. |
| Level change | A sudden rise or drop in loudness that a listener may notice. | One-second loudness windows across the whole decoded file. |
| Silence | A quiet gap inside the recording. | Every channel at or below −60 dBFS for a sustained stretch. |
| Level shift | A long section that sits clearly louder or quieter than the rest. | Minute-level medians compared with the whole recording. |
| Near full scale | Samples close to the digital maximum: possible clipping, or deliberate limiting. | Sample peaks. |
| Musical pace | Not checked. | No tempo reading is made. |
What happens to your audio
- Where it goes
- Your file is stored privately and checked on FocusDen’s own server. It is not sent to an outside AI service.
- Who can open it
- As a guest, only this browser and anyone you give your private return link to. Its key lives in a cookie that page scripts cannot read.
- How long it is kept
- A guest file is deleted 7 days after the check finishes and its report after 30 days. Remove either sooner at any time. An open publication request keeps the file for up to 90 days.
The full detail is on the Privacy page.
Publish your recording on FocusDen
From any finished assessment, you can ask FocusDen to publish the file.
- You askChoose a finished assessment, say how you want to be credited and confirm you control the rights.
- A person reviewsFocusDen listens to the file and reads its report.
- You confirm the releaseIf FocusDen approves it, you confirm the release from a verified account. You can withdraw it later.
Guest or free account
No account needed for the check or the full report.
| Feature | Guest | Free account |
|---|---|---|
| Full report with playable moments | Yes | Yes |
| JSON download and private feedback | Yes | Yes |
| Ask FocusDen to publish | Yes, with a reply email | Yes |
| Reports kept | 30 days | Until you remove them |
| Checks | 1 at a time, 2 hours a day | 3 at a time, 6 hours a day |
| Edited copy, corrections, report-only link | — | Yes |
| Another device | Private return link | Sign in |
A free account also gives you
- Reports kept until you remove themAs a guest, a report is deleted after 30 days.
- More checks3 at a time and 6 hours of audio a day, with 2 GB of private storage. A guest runs 1 at a time, 2 hours a day, with 1 GB.
- An approved edited copyCut flagged moments with a crossfade, hear each join, download the result as FLAC and assess it again.
- Corrections and a report-only linkAdd your note beside any finding, and send a revocable link that shows the report without your audio or transcript.
- Every signed-in deviceYour assessments and publication requests follow your account, with no return link.
An account is free and needs no card. You can move guest assessments into it after you sign up.
Questions
- Is the FocusDen audio assessment free?
- Yes. The check is free with or without an account, and there is nothing to buy to see the full report.
- Do I need an account to assess a recording?
- No. Upload a file as a guest and you get the full report, with every marked moment playable from your own file. A free account keeps reports until you remove them, runs more checks, adds an approved edited copy and a report-only share link. Guest reports are deleted after 30 days.
- What does the assessment listen for?
- Speech, singing, voice-like sounds without words, noise-like passages, silences, sudden level changes, long louder or quieter sections and samples near full scale. Each finding has a timestamp, its basis and a confidence.
- Does it tell me whether music is good for focus?
- No. It reports what it measured and marks moments to hear again. A full listen still decides.
- What happens to my audio file?
- It is stored privately and never changed. The check runs on FocusDen’s own server with locally installed tools; your audio is not sent to an outside AI service. As a guest, the file is deleted 7 days after the check finishes and the report after 30 days, unless you remove them sooner. An open publication request keeps the file for up to 90 days. Nothing is published unless you ask and FocusDen approves it.
- Which files can I upload?
- WAV, MP3, FLAC, OGG, Opus, M4A, MP4 or AAC, up to 512 MB each. A guest can assess 2 hours of audio a day.
- Can I assess a YouTube or SoundCloud link instead?
- No. The check needs an audio file you are entitled to provide.
- Can FocusDen publish my recording?
- You can ask, from any finished assessment, with or without an account. A person listens to the exact file and reads its report. Nothing is published automatically, and going live needs a verified account so you can replace or withdraw the release.
- Will I be paid if FocusDen publishes my music?
- FocusDen plans a paid listening service that shares its revenue with the creators who take part. Its prices, the creator share and the payout terms are not decided yet, and there is no launch date. Publication now is free: listeners pay nothing to hear it and FocusDen pays nothing for it. Before any paid service starts, FocusDen will show you its actual terms, and your recording joins it only if you accept them.