Fadr
fadr.com
What it is
Fadr is a music tool for separating vocals and 15 other instruments from songs, making remixes and DJ sets, and creating instruments and drum kits with AI. Fadr Basic offers unlimited stems, remixes, and DJ sets, with high-quality MP3 downloads; song uploads on Basic are limited to 10 minutes. Fadr Plus provides 18 stem types, uploads up to one hour, WAV downloads, plugins, API access, and unlimited storage for $10/mo.
Siren makes playable instruments from words and provides ADSR controls and low-pass, high-pass, band-pass, and notch filters. DrumGPT creates 16-element drum kits from text prompts, with pitch, volume, and amplitude-envelope controls. The Stems Plugin works with major DAWs and other software that supports VST3, with Windows VST3 and Mac VST3/AU support. Siren is available online, as an iPhone and iPad app, and as an audio plugin. The API separates songs into vocals, drums, bass, melodies, and instrumental, and detects MIDI, chords, key, and tempo. API use requires Fadr Plus; its Create Stem Task endpoint costs US$0.05 per minute of audio.
Spec sheet
- What it does
- Fadr is an AI music-creation platform for stem separation, remixing and generative instruments.Read 14 Oct 2026 · fadr.com
- Support
- Fadr directs users to its contact form, [email protected], or Instagram for support and feature requests.Read 30 Sep 2026 · fadr.com
- License
- Fadr's terms describe the site and software as proprietary and grant only limited personal, noncommercial use; no general Fadr open-source license is stated.Read 14 Oct 2026 · fadr.com
- Headquarters
- Fairfax Station, Virginia, United StatesRead 23 Sep 2026 · fadr.com
- API access
- API use requires Fadr Plus, with the subscription covering the first $10 of API usage each month.Read 14 Oct 2026 · fadr.com
- API authentication
- API requests use Bearer keys created in the account API tab, and keys are tied to account billing.Read 14 Oct 2026 · fadr.com
- API capabilities
- The Fadr API separates songs into vocals, drums, bass, melodies, and instrumental, and provides MIDI, chord progression, key, and tempo detection.Read 30 Sep 2026 · fadr.com
- API documentation
- Fadr publishes technical documentation covering plugins, API overview, authentication, tutorials, endpoints and billing.Read 14 Oct 2026 · fadr.com
- API endpoint
- The documented API base URL is https://api.fadr.com and it provides file, asset and stem-task endpoints.Read 14 Oct 2026 · fadr.com
- API extensibility
- The API uses presigned upload and download URLs, stored assets and asynchronously polled processing tasks.Read 14 Oct 2026 · fadr.com
- API pricing
- The Create Stem Task endpoint costs US$0.05 per minute of audio.Read 14 Oct 2026 · fadr.com
- API scope
- The API returns vocal, drum, bass, melody and instrumental stems plus MIDI, chord progression, key and tempo data.Read 14 Oct 2026 · fadr.com
- Availability limitation
- Terms disclaim guaranteed availability and allow interruption, modification or discontinuation without notice.Read 14 Oct 2026 · fadr.com
- Basic usage
- Fadr Basic allows unlimited stems, remixes, and DJ sets with high-quality MP3 downloads for free.Read 30 Sep 2026 · fadr.com
- Company facts
- LinkedIn lists Fadr as a Fairfax Station, Virginia music company founded in 2020 with 2–10 employees.Read 14 Oct 2026 · linkedin.com
- Company profile
- Crunchbase lists Fadr as a private Fairfax Station company with 11–50 employees and legal name Pebble LLC.Read 14 Oct 2026 · crunchbase.com
- Compliance limitation
- Fadr's terms say the site is not tailored to industry-specific regulations including HIPAA and FISMA.Read 30 Sep 2026 · fadr.com
- Core function
- Fadr separates vocals and 15 other instruments from songs, provides remixing, AI instrument creation, and AI drum-kit creation.Read 30 Sep 2026 · fadr.com
- Data storage
- Fadr says API files are stored in its secure cloud storage and exchanged through temporary presigned upload and download URLs.Read 30 Sep 2026 · fadr.com
- DAW integration
- The Stems Plugin works with all major DAWs and software supporting VST3, on Windows VST3 and Mac VST3/AU.Read 30 Sep 2026 · fadr.com
- DJ tool
- Fadr includes a DJ workflow for making DJ sets with synchronized transitions and mashups.Read 14 Oct 2026 · g2.com
- DrumGPT
- DrumGPT generates playable drum kits from textual descriptions and is offered online and as a plugin.Read 14 Oct 2026 · fadr.com
- Legal maker
- Fadr's terms identify the maker as Pebble LLC doing business as Fadr, registered in Virginia.Read 14 Oct 2026 · fadr.com
- Limit: iPad integration
- An Apple reviewer asked for AUv3 support so Siren could run inside iPad DAWs.Read 14 Oct 2026 · apps.apple.com
- Limit: renewals
- Trustpilot reviews mention unexpected subscription renewals and occasional slow support responses.Read 14 Oct 2026 · trustpilot.com
- Limit: Siren output control
- Google Play reviewers say generated sounds can diverge from prompts and request more timbre and recording controls.Read 14 Oct 2026 · play.google.com
- Limit: stem artifacts
- Trustpilot's review summary reports complaints that separated audio can sound whooshy, weak or incoherent.Read 14 Oct 2026 · trustpilot.com
- Mobile availability
- Siren is available online, as an iPhone and iPad app, and as an audio plugin compatible with all major DAWs.Read 30 Sep 2026 · fadr.com
- Notable news: SoundCloud integration
- A January 25, 2024 announcement said SoundCloud partnered with Fadr to support upload, editing and automatic Made with Fadr tags.Read 14 Oct 2026 · recordoftheday.com
- Notable news: SynthGPT
- A January 22, 2024 independent report described SynthGPT as a text-to-synth beta generating about 100 royalty-free synth options from prompts.Read 14 Oct 2026 · killthedj.com
- Plugin formats
- The Stems plugin supports VST3 on Windows and VST3 or AU on macOS and works with major DAWs and VST3 hosts.Read 14 Oct 2026 · fadr.com
- Plugin licensing
- Each Plus subscription permits up to three active Fadr VST licenses.Read 14 Oct 2026 · fadr.com
- Plugin limits
- New plugin stemming requires an active Plus subscription, about eight seconds of contiguous audio to start, internet access and a 44.1 kHz AI input rate.Read 14 Oct 2026 · fadr.com
- Plugin processing
- The plugin records DAW audio, uploads it to Fadr servers for processing and returns four controllable stems.Read 14 Oct 2026 · fadr.com
- Praise: ease of use
- The sole G2 reviewer described Fadr as complex yet easy to use and good at improving recordings.Read 14 Oct 2026 · g2.com
- Praise: support
- Trustpilot reviewers repeatedly praise fast, helpful support and quick refund handling.Read 14 Oct 2026 · trustpilot.com
- Privacy and hosting
- Fadr's privacy policy says its service is a web platform, and its terms say the site is hosted in the United States.Read 30 Sep 2026 · fadr.com
- Privacy controls
- Users may request permanent account and personal-data deletion through Fadr support.Read 14 Oct 2026 · fadr.com
- Pro stem separation
- Fadr Plus provides 18 stem types, including individual vocal, drum, and melody stems.Read 30 Sep 2026 · fadr.com
- Rating on Apple App Store
- 4.6 out of 5 from 38 ratingsRead 14 Oct 2026 · apps.apple.com
- Rating on G2
- 5.0 out of 5 from 1 reviewRead 14 Oct 2026 · g2.com
- Rating on Google Play
- 4.5 out of 5 from 1.85K reviewsRead 14 Oct 2026 · play.google.com
- Rating on Trustpilot
- 4.6 out of 5 from 204 reviewsRead 14 Oct 2026 · trustpilot.com
- Remix Maker
- Remix Maker creates synchronized remixes and mashups while allowing key and tempo changes.Read 14 Oct 2026 · fadr.com
- Security statement
- Fadr says it uses commercially acceptable safeguards but does not guarantee absolute security.Read 14 Oct 2026 · fadr.com
- Self-hosting
- Fadr documents cloud processing and storage and provides no self-hosting deployment option.Read 14 Oct 2026 · fadr.com
- Siren
- Siren generates playable instruments from text prompts or voice and is available online, as an app and as a plugin.Read 14 Oct 2026 · fadr.com
- Stem analysis
- Stems processing detects tempo, musical key and chord progression and can output MIDI.Read 14 Oct 2026 · fadr.com
- Stem separation
- The Stems tool extracts vocals and 15 other instruments from uploaded songs.Read 14 Oct 2026 · fadr.com
- Supported uploads
- The Stems help guide accepts WAV, MP3, M4A, AAC, AIF and FLAC files up to 200 MB.Read 14 Oct 2026 · fadr.com
- Upload limit
- Fadr Plus increases the song upload limit from 10 minutes to 1 hour.Read 30 Sep 2026 · fadr.com
Plans and prices
Fadr Basic Free free for life vocals · melodies · drums · bass · basic stems · MP3 downloads · MIDI detection · Remix Maker Read 14 Oct 2026 · fadr.com
Fadr Plus $10 a month $10/mo 18 stem types · Pro Stems · 1-hour uploads · WAV downloads · plugins · API · unlimited storage · concurrent stems Read 14 Oct 2026 · fadr.com
Fadr Plus $100 a year $100/yr 18 stem types · Pro Stems · 1-hour uploads · WAV downloads · plugins · API · unlimited storage · concurrent stems Read 14 Oct 2026 · fadr.com
Strong points and limits
Strong points
- Basic includes unlimited stems, remixes, and DJ sets
- Plus offers 18 stem types and one-hour uploads
- Siren creates playable instruments from words
- DrumGPT creates 16-element kits from text prompts
- API detects MIDI, chords, key, and tempo
Limits
- Basic song uploads are limited to 10 minutes
- API use requires Fadr Plus
- API stem task costs US$0.05 per audio minute
Who it suits
Fadr suits people who want to separate song parts, create remixes or DJ sets, or make instruments and drum kits from prompts. Its plugins and API also serve users working with compatible DAW software or integrations.
Fadr in depth
Read the full write-up
Overview
Fadr combines song separation and remixing with tools for generating instruments and drum kits. It suits producers who want to move from isolating parts of a track to reshaping them in one service. The free Basic plan covers core stem and remix work; Plus is needed for expanded stems, WAV exports, plugins and API access.
For broader comparisons, browse AI Music Remixing Tools, AI stem splitters and Stem Separation Software.
Key features
Separate and remix songs
Basic separates vocals, melodies, drums and bass, and includes Remix Maker, unlimited stems, remixes and DJ sets, MIDI detection and MP3 downloads. That is a substantial free toolkit for short projects, but its 10-minute song limit and narrower stem selection matter if you work with longer tracks or need isolated parts beyond those four groups.
Plus expands separation to 18 stem types, including lead and background vocals, kick, snare, piano, guitar, acoustic and electric guitar, strings, wind and other melody and drum categories. It raises the track limit to one hour and adds WAV downloads. The 200 MB maximum upload size still applies, so track length alone does not determine whether a file fits.
Generate instruments and drum kits
Siren turns words into playable instruments and provides ADSR controls and low-pass, high-pass, band-pass and notch filters. DrumGPT generates 16-element kits from text prompts, with pitch, volume and amplitude-envelope controls. These controls make the generators more useful for shaping results than prompt-only tools, though Fadr's core distinction remains combining them with separation and remixing.
Plugins and API
The Stems Plugin works with major DAWs and other VST3-compatible software; it is offered as VST3 for Windows and VST3/AU for Mac. Siren is also available online, as an iPhone and iPad app, and as a plugin compatible with major DAWs.
The API can separate vocals, drums, bass, melodies and instrumental, and detect MIDI, chord progressions, key and tempo. API use requires Plus, and its Create Stem Task endpoint costs US$0.05 per minute of audio. Files pass through Fadr's secure cloud storage using temporary presigned upload and download URLs.
Pricing
Fadr Basic costs nothing. It includes vocals, melodies, drums and bass separation, MP3 downloads, MIDI detection and Remix Maker, with unlimited stems, remixes and DJ sets. It is the sensible starting point for casual remixing and shorter tracks; the trade-off is the 10-minute limit, fewer stem choices and no WAV downloads.
Fadr Plus costs $10 a month, billed $10/mo. It adds 18 stem types, one-hour uploads, WAV downloads, plugins, API access and unlimited storage. Choose it for longer material, more granular parts or DAW and API workflows. API stem tasks carry the separate US$0.05 per-minute charge.
Platforms
Fadr is available on the web and through API access, with iOS, macOS and Windows support. Siren has iPhone and iPad apps; the Stems Plugin supports Windows VST3 and Mac VST3/AU, as well as major DAWs and software that supports VST3.
Who it's for
Fadr is a good fit for remixers and producers who want free access to basic stems and DJ sets, then the option to pay for longer tracks, individual instrument groups, WAV output or DAW plugins. Its instrument and drum-kit generators add value for people developing parts alongside remix work. It is less suited to users who need a workflow without cloud file handling or whose requirements include industry-specific compliance: Fadr's terms say its service is not tailored to regulations such as HIPAA or FISMA.
Pros and cons
Pros: Basic allows unlimited stems, remixes and DJ sets at no charge, so experimentation is not constrained by a stated usage quota.
Pros: Plus combines 18-way separation, one-hour tracks, WAV downloads, plugins and API access in one plan.
Pros: Siren and DrumGPT provide specific sound-shaping controls alongside text-driven generation.
Cons: Basic is limited to 10-minute songs and MP3 exports, which can rule it out for longer sessions or workflows needing WAV.
Cons: API use requires Plus and adds a US$0.05-per-minute stem-task cost.
Cons: The service is cloud-based and not tailored to sector-specific requirements such as HIPAA or FISMA.
Alternatives
AceStep AI Music Remixer is worth comparing if you prefer a credit-based model, including one-time credit purchases, rather than Fadr's monthly Plus subscription.
MeloLab AI Remix is another web-based option with a free tier and one-time credit packs; consider it if that purchase structure better suits occasional use.
MusicWave.ai offers a web-based free tier and a monthly Starter plan, making it another option for readers comparing subscription-based remix tools.
StemForge is the alternative to consider when running open-source software locally across desktop platforms matters more than Fadr's integrated remixing and generation tools.
AetherWave Music Studio is another web and API option for readers comparing music-creation services.
Mubert AI Music Remixer offers a web-based, credit-limited free tier and monthly Starter plan for readers weighing another subscription option.
RiffGen Remixer AI has a free monthly generation allowance and a paid plan with unlimited generations, so it may suit readers prioritizing that pricing structure.
AI Remix Music Generator is a web-based alternative with a free credit allowance and a monthly Starter plan.
Verdict
Choose Fadr if you want stem separation and remixing in the same place, with free unlimited core use and a clear upgrade path to finer stems, longer uploads, WAV, plugins and API access. Its strongest case is breadth across the remix workflow; look elsewhere if local processing or industry-specific compliance is essential, or if the Plus subscription and per-minute API charge do not fit your use.
Verdict
Fadr combines stem separation with remixing, AI instrument and drum-kit creation, plugins, and API access. Basic is free; Plus costs $10/mo and the API stem task has a separate listed per-minute cost.
Where Specifiction places it
- AI Instrument Generators#1 of 289.1
- AI stem splitters#2 of 269.3
- Stem Separation Software#2 of 219.3
- AI Music Remixing Tools#4 of 229.1
Alternatives to FadrAll alternatives →
DAACI Natural Drums 7.8 Visit 
Moises Free plan 7.8 Visit 
Baza Drums 7.7 Visit 
Drummer Buddy 7.5 Visit