VOCALS FROMMidnight Signal118 BPM · F minor
VOCAL One OG Mix. Better local engines.
Two songs.
One impossible mix.
BLENDLINE AI X is a free local AI music mashup maker for Windows. Put the vocals from one song over the music of another, then separate, align and render the full OG Mix on your PC.
Windows 10/11 · x64 · current release 1.12 Beta 10 · local processing
LOCAL
“Free and unlimited” means processing runs on your computer without a metered cloud service. No credits and no per-mix API bill. Speed and maximum quality depend on your CPU, GPU, RAM and the engine you choose.
Read the details ↓ CORE MDX READYLOCAL · PRIVATE
MUSIC FROMElectric Bloom121 BPM · F minor
MUSICSEPARATED VOCALOG MIXINSTRUMENTAL
0:002:41DRAG PLAYHEAD · 1:16
ONE OG MIX ✦ LOCAL ENGINES ✦ VOCAL SPEED LOCK ✦ NO MIX CREDITS ✦ PRIVATE RENDERING ✦ ONE OG MIX ✦
What is BLENDLINE AI X?
BLENDLINE AI X is free Windows software for making AI-assisted music mashups locally. It can isolate vocals and instrumentals, analyze tempo and musical timing, align two recordings, and export a full-length WAV without charging per mix.
The desktop app includes OG Mix for vocal-and-instrumental mashups, R Mode for placing an authorized vocal over newly generated music, V Mode for consent-first two-voice duet experiments, and the new T Mode development build for full local trance transformations. Processing speed and quality depend on your computer's CPU, GPU and memory.
THREE LOCAL AI STUDIOSThree studios.
Three studios.
Purpose-built local engines.
T builds and scores complete trance productions around an authorized vocal. R creates a new genre-specific backing. V uses optional SoulX-Singer Studio for consent-first two-voice duets. All are designed to run locally after setup without a BLENDLINE per-song meter.
TFLAGSHIP TRANCE ENGINE · NEXT BETA
Your vocal. Festival scale.
Create and score one, two or three full trance productions, preserve natural vocal speed, lock the singer to the beat, build bass and sidechain movement, and master a local WAV.
Explore T Mode →RVOCAL REMIX STUDIOKeep the vocal. Replace the world.
Isolate the original singer, generate completely new genre-specific music, clean the backing, protect vocal formants and lock both stems to the beat.
Explore R Mode →VTWO-VOICE DUET STUDIOOne song. Two voices.
Keep Song 1's words, melody, timing, singer and music. Add a second authorized voice, then arrange both singers into a local duet.
Explore V Mode →T Mode development build: Fast creates one neural take, Strong creates and scores two, and Maximum creates and scores three. Vocal Speed Lock stays on by default. T reuses the same optional ACE-Step 1.5 engine as R Mode, so existing R installations do not need a second music engine.
01 / ONE WORKFLOWOG Mix gets better.
OG Mix gets better.
It does not multiply.
Plans do not rename the same result into different “modes.” They change the requested local separation engine, protected-performance controls and mastering quality.
Separate
A selected local neural engine isolates the lead vocal and instrumental on your Windows computer.
Protect
Plan settings can preserve vocal speed, original pitch, natural performance order and the detected downbeat.
Render
OG Mix aligns, masters and exports a full-length WAV without a metered cloud rendering service.
02 / ENGINE PLANSPay for a stronger engine.
Pay for a stronger engine.
Not another label.
All five local engine paths are present in the current beta. Prices shown are the proposed public plans; checkout remains off until licensing, reliability and release quality are ready.
AVAILABLE NOWFree
$0forever
Fast, private OG Mix rendering with the bundled local two-stem engine.
LOCAL ENGINECore MDX
- ✓OG Mix
- ✓Automatic beat alignment
- ✓Detected downbeat
- ✓Balanced 16-bit master
LOCAL ENGINE READYPlus
$4.99/ month planned
Cleaner instrumental reconstruction and more control over the musical match.
LOCAL ENGINEClean MDX
- ✓Everything in Free
- ✓Original Pitch Lock
- ✓Higher-overlap separation
- ✓Clean 24-bit master
LOCAL ENGINE READYCreator
$9.99/ month planned
A larger local model focused on cleaner, more natural exposed vocals.
LOCAL ENGINERoFormer Vocal
- ✓Everything in Plus
- ✓Vocal Speed Lock
- ✓Natural Vocal Flow
- ✓Formant-safe alignment
LOCAL ENGINE READYPro
$19.99/ month planned
A slower studio pass designed for separation detail, transients and mastering.
LOCAL ENGINEHybrid Studio
- ✓Everything in Creator
- ✓Hybrid local separation
- ✓Transient protection
- ✓Studio mastering
LOCAL ENGINE READYUltra
$34.99/ month planned
Choose any engine, prioritize speed or quality, or use the maximum-quality ensemble.
LOCAL ENGINEEngine Hub
- ✓Every BLENDLINE engine
- ✓Fast / balanced / max quality
- ✓All performance locks
- ✓Hardware-aware selection
No processing quotas. Paid plans are intended to unlock local engines and controls, not usage allowances. Final public pricing and availability will be announced only after engine validation.
ENGINE READINESS
What each name actually means
ENGINETECHNOLOGYPRIORITYSTATUS
Core MDXMDX / ONNXFastestBundled in current desktop release
Clean MDXMDX / ONNXFast + cleaner bedInstall from the engine card
RoFormer VocalBS-RoFormerSlower + cleaner vocalInstall from the engine card
Hybrid StudioDemucs + cleanupStudioInstall from the engine card
Maximum Quality EnsembleMulti-passHighest target qualityInstall from the engine card
03 / LOCAL AND UNMETEREDYour computer
CPUAlways matters GPUCan accelerate AI RAM / VRAMSets the ceiling STORAGEModels live locally
Your computer
is the render service.
BLENDLINE does not charge the engine per minute or send standard desktop mixes into a shared cloud queue. The work happens on your machine.
Handles decoding, analysis, mixing and fallbacks. Slower processors take longer.
Supported local engines can use Windows GPU acceleration. Compatibility varies by engine.
Larger models and longer tracks require more memory. Maximum quality may not fit every computer.
Premium model downloads can be large. They are stored on the device after installation.
NO mix creditsNO render tokensNO per-mix API billNO standard audio upload
“Unlimited” describes local processing allowance, not guaranteed speed, hardware compatibility, storage, model availability, content ownership or permission to publish a mashup.
04 / WINDOWS DESKTOPOG Mix plus
OG Mix plus
R and V.
Beta 10 retires Z Mode to keep the product focused on the workflows that create the strongest results: OG Mix, R vocal remixes and V consent-first duets.
- ✓ Free, unmetered local processing
- ✓ Anonymous activated-install total
- ✓ New-today and active-seven-day statistics
- ✓ One-way-hashed random installation identity
- ✓ No media or personal-content telemetry
- ✓ SoulX-Singer Studio V engine
- ✓ Four local V Mode WAV exports
- ✓ R Mode new-instrumental workflow
BLENDLINE AI XDesktop edition · current beta 1.12.0 Beta 10
- PLATFORM
- Windows 10 / 11
- ARCHITECTURE
- 64-bit
- INSTALLER
- 392.9 MB
- PROCESSING
- Local / unmetered
Your idea.
Your responsibility.
Only upload or link media that you own or are authorized to use. You are responsible for obtaining all necessary rights. Local processing, a paid plan or a BLENDLINE export does not grant licences to third-party music and does not guarantee that a mashup can legally be published or monetized.
06 / CLEAR ANSWERSKnow what runs.
Know what runs.
Know what it needs.
Honest answers about local processing, performance, engine readiness, supported media and rights.
01What does free and unlimited actually mean?+
Everything runs on the user’s computer without a metered cloud service. There are no mix credits, render tokens, upload queues or per-mix API charges. Performance depends on the computer’s CPU, GPU and available memory, and larger premium engines may require separate model downloads.
02Does BLENDLINE upload my music?+
The standard desktop workflow performs neural stem separation, analysis and rendering locally. Your source files stay on your machine. A future optional online service would be identified clearly before any upload.
03Why can a higher-quality engine take longer?+
Larger models and multi-pass engines perform more calculations and can require more GPU memory or system RAM. Ultra therefore lets users choose speed, balanced quality or maximum quality instead of claiming one engine is always fastest and best.
04What does Fast Local change in R and V Mode?+
It keeps the full recording length but reduces the expensive neural refinement loop. R Mode uses 8 music-generation steps instead of 12 or 20. V Mode uses 8 Studio conversion steps instead of 16 or 32. The app also estimates remaining time from the song length and local hardware.
05Are all five engine paths available today?+
Yes, the current beta includes the five engine paths and an installer button for every optional local model. Plan checkout is not active yet, so public pricing remains a product proposal rather than a charge.
06What does the redesigned V Mode make?+
V Mode uses Song 1 as the complete musical foundation and Song 2 only as an authorized second-voice reference. It preserves Song 1's words, melody, timing and instrumental, creates Voice 2 locally, arranges both singers as a duet, and exports the mix plus three stems.
07How large is the V Mode voice engine?+
The SoulX-Singer Studio checkpoint is about 2.8 GB. Allow roughly 6–8 GB for the complete optional setup, support files and cache. A CUDA GPU with at least 6 GB of VRAM is recommended. Existing Seed-VC installations remain available as an automatic legacy fallback.
08Which files can I use?+
The desktop app accepts common audio and video formats, including MP3, WAV, M4A, MP4, MOV, MKV and WebM, and exports a full-quality WAV.
09Can I paste a YouTube link?+
The desktop beta can convert an eligible link into local media when you own the content or are authorized to download it. Source availability and platform rules still apply; the converter is not a copyright workaround.