Fadr
Fadr is a web platform of AI music tools that splits any song into up to 18 stems, detects key, tempo and chords, builds remixes and DJ sets, and generates playable instruments from prompts. Most of it is free.
What is Fadr?
Fadr is a browser-based suite of AI music tools published by Pebble LLC, a small company registered in Fairfax Station, Virginia. Its homepage promise, Creativity Amplifying Music Tech, describes the idea well: take a finished recording apart, rebuild it, and invent new sounds around it without leaving the browser.
The core of the platform is Stems. Upload a track and Fadr separates it into vocals, melodies, drums and bass on the free tier, or into eighteen distinct stem types on the paid one, including lead and background vocals, piano, acoustic and electric guitar, wind, strings, kick and snare. The same pass returns MIDI for every stem except the drums, the chord progression as both text and MIDI, and key and tempo detection.
Remix turns those parts into a mashup studio: pick a track from the library or bring your own, and Fadr matches key and tempo by itself, leaving the creative decisions to you. DJ carries the same idea into live performance, with two decks fed by your own stemmed library and AI beat, key and tempo matching.
Two generators sit alongside them. Siren builds a playable instrument from a written description, with ADSR shaping, low-pass, high-pass, band-pass and notch filters at 12 or 24 dB/oct, and a spectrograph. DrumGPT does the same for drum kits. Both play from the computer keyboard and both ship as DAW plugins.
Fadr also reaches beyond the browser: an iOS app for Stems, iOS and Android apps for Siren, and three plugins in VST3 on Windows and VST3 or AU on macOS 10.10 and above. The Stems plugin runs in Live, Record and Upload modes, separating audio inside the DAW itself. A REST API exposes the separation engine to developers at five cents per minute of audio.
The commercial model is unusually flat. Fadr Basic is free for life and unlimited, with MP3 downloads; Fadr Plus costs ten US dollars a month or a hundred a year and unlocks everything else. The site is English only, and the footer shows version 6.2.
What it does
- Split any song into as many as 18 separate stems
- Detect key, tempo and chord progression, and export them as text and MIDI
- Extract MIDI from every stem except the drums
- Build remixes and mashups with key and tempo synchronised automatically
- Generate playable instruments and drum kits from a written description
- Perform live DJ sets with AI beat matching across your own stemmed library
- Call the separation engine from your own application through the REST API
When to use Fadr / When not to
A quick filter to help you decide if Fadr is the right fit.
When to use Fadr
- Music producers and beatmakers who need clean multitrack stems, MIDI and chord detection pulled straight out of finished records
- DJs building live sets, who want their own library beat, key and tempo matched for them
- Remixers and mashup makers with no production background, since Fadr handles the synchronisation
- Sound designers hunting for royalty-free instruments and drum kits generated from a written description
- Developers who need a stem separation API priced by the minute of audio rather than by seat
When not to use Fadr
- Songwriters expecting the AI to compose a whole track or sing a vocal: Fadr processes and synthesises, it does not write songs
- Podcasters and video editors after speech transcription or subtitles, which the platform does not do
- Organisations bound by the GDPR, HIPAA or comparable rules, since there is no data processing agreement, no subprocessor list and the terms explicitly disclaim sector compliance
- Teams needing anything other than English, as the interface and the documentation exist in that language only
- Anyone unwilling to grant a perpetual, sub-licensable licence over the content they upload, which the terms of use require
How to use Fadr
A typical end-to-end flow, from setup to results.
- Create an account on the sign-up page, or log in with Google, Facebook or Twitter
- Pick a tool from the Create page: Stems, Remix or DJ
- In Stems, upload a track, up to 10 minutes on the free tier and up to an hour on Fadr Plus
- Wait for the separation, which Fadr advertises at 30 seconds or less for Pro Stems
- Download the parts as MP3, or as lossless 32-bit WAV on Fadr Plus, together with the MIDI and the chord chart
- In Remix, choose a pack from the library or bring your own song and let Fadr match key and tempo
- In DJ, load a deck from your library and mix with the automatic sync running
- For Siren or DrumGPT, type a description, play the result from the computer keyboard, and download the kit
- Install the plugins from the Plugins tab of your account page, then load them in your DAW
- For the API, subscribe to Fadr Plus, request a presigned URL, create an asset, start a task and poll its status
Pros & Cons
Pros
- A genuinely usable free tier, advertised as 95% of the platform, with unlimited stems, remixes and DJ sets
- One flat paid tier at $10 a month or $100 a year, with no seat counting and no feature ladder
- Eighteen stem types, more than either of the two competitors Fadr names in its own comparison table
- Separation, MIDI, chords, remixing, DJing and instrument synthesis gathered in a single account
- Professional output formats, including lossless 32-bit WAV downloads
- Available as a web app, iOS and Android apps, VST3 and AU plugins, and a REST API
- Siren's generated sounds are royalty-free, and plugin stems stay on your machine after you cancel
Cons
- No GDPR framework at all: no data processing agreement, no subprocessor list, no EU representative
- The content licence granted to Pebble LLC is unusually broad, being perpetual, irrevocable, sub-licensable and open to commercial exploitation
- No free trial of Fadr Plus; the only safety net is a refund Fadr may decline after heavy use
- English only, interface and documentation alike
- The API sits behind an active Fadr Plus subscription, so there is no standalone developer key
- Support runs through a form and a single generic address, with no phone, chat or service level commitment
- No published security certification and no choice of hosting region, with everything held in the United States
Pricing & Plans
Fadr operates a permanent free plan, Fadr Basic, which is unlimited and requires no payment. The cheapest paid entry point is Fadr Plus at USD 10.00 per month, or USD 100.00 per year. API usage is billed separately at USD 0.05 per minute of audio and requires an active Fadr Plus subscription.
- separation into vocals
- melodies
- drums and bass
- Basic Stems
- MP3 downloads
- MIDI detection and the Remix Maker
- Siren and DrumGPT plugins
- Pro Stems
- one-hour uploads
- individual vocal
- drum and melody stems
- WAV downloads
- the Stems plugin
- individual remix tracks
- $0.05 per minute of audio on the Create Stem Task endpoint
- on top of a mandatory Fadr Plus subscription
- with an initial $10 billing threshold
Data, GDPR & hosting
A consolidated view of how Fadr handles your data.
GDPR overview
There is no mention of the GDPR anywhere on the site. Across every page collected, terms of use, API terms and privacy policy included, the words GDPR, General Data Protection Regulation, CCPA and Article 27 never appear. The privacy policy, effective 4 September 2023, follows a United States template: it names the United States as the country of reference, states no legal basis for processing, and describes none of the European data subject rights apart from deletion, which is handled manually through the footer contact form. No data processing agreement is offered, no EU representative is designated, and no subprocessor list is published. The terms run the other way: continued use of the site from outside the United States counts as consent to transfer your data there.
Who owns the data?
Fadr's terms are explicit that the work stays yours: the company does not assert any ownership over your Contributions, and you retain full ownership and every intellectual property right attached to them. In exchange you grant Pebble LLC an unrestricted, irrevocable, perpetual, worldwide, royalty-free and transferable licence to host, copy, sell, resell, publish, broadcast, translate, excerpt and distribute that content for any purpose, commercial and advertising included, with the right to sub-license, and you waive your moral rights. Feedback goes further: suggestions and ideas sent to Fadr become its sole property, without compensation. The API terms repeat the same split for anything submitted through a developer client.
Reuse rights
What you produce on Fadr is yours to use without asking. Stems, MIDI, chord charts, remixes and DJ mixes download freely, as MP3 on the free tier and as lossless 32-bit WAV on Fadr Plus, and Siren states that its generated sounds are 100% royalty-free and that anything you create is fully yours. Stems made with the DAW plugin are stored on your own machine and survive the end of a subscription. Two limits matter. Fadr grants no rights whatsoever over the source recording: the terms make you warrant that you already hold every licence needed for the music you upload. And the terms of use reserve the site itself for personal, non-commercial use unless Fadr specifically endorses the commercial purpose, a clause worth clarifying before building a paid service on top of it.
Data retention & training
Hosting summary
The terms of use state plainly that the site is hosted in the United States, and the privacy policy names the United States as its country of reference. Anyone reaching the platform from another region is told that continued use transfers their data there and that they agree to it being processed under US law. The privacy policy adds that information is handled at the company's operating offices and wherever the parties involved in the processing happen to be, so onward transfers are possible without further notice. Governing law is that of the Commonwealth of Virginia, with disputes heard in Fairfax County. Nothing else is documented: no subprocessor is named, no alternative region is offered, and there is no data residency option. DNS resolves the domain to an Amazon CloudFront edge node, which reflects content delivery rather than where user files are actually stored.
Things to keep in mind
Risks and trade-offs to weigh before adopting Fadr.
- Separating or remixing a copyrighted recording gives you no rights over it, and the terms make you warrant that you already hold every permission needed
- The licence you grant Fadr over uploaded content is perpetual, irrevocable, sub-licensable and commercially exploitable, and you waive your moral rights
- Ideas and feedback you send become Fadr's sole property, with no acknowledgement and no compensation
- Your data is hosted in the United States, and simply continuing to use the site counts as consent to that transfer whatever your own jurisdiction
- Retention is described only as as long as is necessary, with no figure attached, and deletion happens only if you ask for it through the contact form
- Separation and generation run in the cloud, so the plugins stop producing anything new the moment the service is down or the subscription lapses
- Automatic key and tempo matching removes the ear training that remixing used to demand, and leaning on it too early can stall a producer's own listening skills
Setup & Integrations
Technical difficulty
Almost none for web use. Create an account, or sign in with Google, Facebook or Twitter, and Stems, Remix, DJ, Siren and DrumGPT all run in the browser with nothing to install. The plugins sit one step up: download them from the Plugins tab of your account, then install a VST3 on Windows or a VST3 or AU on macOS 10.10 and later, the usual routine for any audio plugin. The API is the only developer-level task, since it needs a Fadr Plus subscription, credentials, presigned URLs and polling of task status.
Deployment
Apps stores
Integrations
Supported languages
Behind Fadr
Social
Resources
All the official URLs gathered for verification and reference.
Alternatives
Tools that compete with or complement Fadr.
Frequently asked questions
Is Fadr really free?
How much does Fadr Plus cost?
How many stems can Fadr separate?
Does Fadr have an API?
Are there desktop plugins and mobile apps?
What happens to my stems if I cancel?
Is Fadr GDPR compliant?
How do I delete my data?
Which competitors does Fadr compare itself to?
Should you pick Fadr?
Fadr is one of the rare AI music tools whose free tier is not a teaser. Separation into four stems, MIDI extraction, chord and tempo detection, the remix studio and the DJ controller all work without paying, unlimited, and the paid tier is a single flat plan at ten dollars a month. For a solo producer, a bedroom DJ or a music teacher who needs an instrumental before Friday, that combination is hard to beat, and the breadth on offer is unusual: few competitors cover separation, MIDI, chords, remixing, live DJing, instrument synthesis, DAW plugins and a REST API from one account.
The platform also looks maintained rather than abandoned. The footer shows version 6.2, the blog has run since 2022, and the recent additions, DrumGPT and Pro Stems, are substantial rather than cosmetic.
The reservations are legal rather than technical. Pebble LLC publishes no GDPR commitment, no data processing agreement and no subprocessor list, hosts everything in the United States, and sets no retention period beyond as long as is necessary. The licence you grant over uploaded content is perpetual, irrevocable and sub-licensable, and anything you send as feedback becomes Fadr's property outright. None of that is unusual for a small consumer product, but it puts the tool out of reach of any organisation that has to document where its data goes.
Read it, then, as an excellent creative instrument for individuals and small studios, and as a poor fit for regulated or enterprise use. Try the free tier first: it is generous enough to tell you within an afternoon whether Fadr Plus is worth the ten dollars.
- Choosing a selection results in a full page refresh.
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