Demixr
Demixr is a web-based audio processing service for creators, mixers, and content teams.
What Demixr is
Demixr is a web-based audio processing service for creators, mixers, and content teams. It handles vocal and instrumental separation, stem separation, dereverb, speech-segment detection, and BPM and key analysis. Its stem tool separates tracks into vocals, drums, bass, and other parts. Demixr Pro 1.5 offers a Voice mode for complex mixes, live recordings, or speech over music, and a Music mode for songs, covers, or separating vocals from accompaniment. For dereverb, Demixr recommends first isolating vocals, since processing a full mix can introduce artifacts or distortion. VAD creates editable speech markers and supports batch export, but detection can be inaccurate when vocals are quiet or recordings are noisy. The BPM tool analyzes tempo, key, and Camelot values, with optional tap-to-sync. The free plan includes 10 minutes of uploaded audio per month, a 10 MB upload limit, two VAD uses, queued processing, and no WAV downloads. Uploads and outputs are deleted within 24 hours by default.
Good
- Separates stems into vocals, drums, bass, and other.
- VAD markers are editable and support batch export.
- BPM analysis includes key and Camelot values.
- Uploads and outputs are deleted within 24 hours by default.
- Paid purchases do not automatically renew.
Watch out
- Free plan limits uploads to 10 MB.
- Free plan has no WAV downloads.
- VAD can be inaccurate with quiet vocals or noise.
- Processing pages require audio of at least 15 seconds.
Who it suits
Demixr may suit creators, mixers, and content teams who need browser-based audio separation, speech markers, or tempo and key analysis. Its workflow is relevant to users processing either music or voice recordings.
Verdict
Demixr brings several audio analysis and separation tasks into a web service, with separate vocal and music modes. Check the free upload limits and the stated VAD caveat before choosing it for a workflow.
Plans and prices
From Demixr's own pricing page, checked 3 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 10 minutes of uploaded audio/month · max 10MB per upload · 2 free VAD uses · BPM subject to fair use · queued processing · no WAV downloads |
| Go | $4 a month | 10h audio/month · 50MB per upload · VAD and BPM subject to fair use · priority queue · WAV downloads · $4 / 1 month; one-time payment, no auto-renewal |
| Plus | $9 a month | 50h audio/month · 150MB per upload · VAD and BPM subject to fair use · priority queue · WAV downloads · $9 / 1 month; one-time payment, no auto-renewal |
| Pro | $15 a month | 100h audio/month · 500MB per upload · VAD and BPM subject to fair use · priority queue · WAV downloads · $15 / 1 month; one-time payment, no auto-renewal |
The facts
Each one read from Demixr's own pages, with the date it was checked.
What it does
- Audience
- The homepage describes Demixr as serving creators, mixers, and content teams.checked 3 Oct 2026
- Audio retention
- Uploaded audio and outputs are deleted within 24 hours by default, and uploaded audio is not used for training or analysis unless explicitly authorized.checked 3 Oct 2026
- BPM and key
- The BPM tool analyzes tempo, key, and Camelot values and includes optional tap-to-sync.checked 3 Oct 2026
- Dereverb workflow
- Demixr recommends separating vocals first and applying dereverb to the isolated vocal, because applying it directly to a mixed track may cause artifacts or distortion.checked 3 Oct 2026
- Integration
- The billing page says checkout is processed by Creem and may support Alipay, cards, PayPal, Apple Pay, Google Pay, and other local methods where available.checked 3 Oct 2026
- Payments and refunds
- Paid plans are one-time purchases with no automatic renewal; refund requests may be made within 7 days if paid processing quota has not been materially used.checked 3 Oct 2026
- Product
- Demixr is an online audio processing service for vocal and instrumental separation, dereverb, VAD markers, BPM/key analysis, and stem separation.checked 3 Oct 2026
- Security and privacy
- The privacy policy says Demixr uses access controls, signed links, and server-side permission boundaries, and does not sell personal data.checked 3 Oct 2026
- Stem separation
- The stem tool separates music into vocals, drums, bass, and other using Demucs.checked 3 Oct 2026
- Support
- Demixr lists [email protected] for support, refunds, and compliance matters.checked 3 Oct 2026
- Upload limits
- The processing pages state a 15-second minimum audio duration and maximum file sizes of 200 MB for non-subscribers and 500 MB for subscribers.checked 3 Oct 2026
- VAD
- VAD detects speech segments and provides editable markers and batch export; detection may be inaccurate with low vocal volume or noisy recordings.checked 3 Oct 2026
- Vocal separation modes
- Demixr Pro 1.5 offers Voice mode for complex mixes, live recordings, or speech over music, and Music mode for songs, covers, and vocal/accompaniment separation.checked 3 Oct 2026
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