Free AI Mashup Maker: Blend Two Songs Together
Create massive mashups in seconds. Extract clean acapellas and instrumentals from any two songs using AI, detect their BPM, and blend them in your DAW. 100% private, no upload, no sign-up.
- No upload
- AI runs locally
- BPM detection
- Export WAV
Mashup Maker – Blend Songs Together
Upload a track to extract either the Acapella or Instrumental for your mashup. Use it twice for two different songs!
Up to 30MB. Long songs can be processed in sections.
AI engine loads when needed
AI mode gives the best result. If a phone runs out of memory, tap ⚡ Quick and press Separate again.
Cleanest separation. Use on a desktop or laptop with a good processor and 8GB+ RAM. ★ Recommended for this device.
How do I make a mashup for free?
Use the ToolDeck Mashup Maker: Upload Song A to extract the Acapella, then upload Song B to extract the Instrumental. Download both WAV files, check the BPM badge, and blend them together in any DAW. It is free, needs no account, and your audio is never uploaded.
- Price
- Free: no account, no watermark, no daily limit
- Upload required?
- No. AI runs 100% locally in your browser
- Input formats
- MP3, WAV, M4A
- Output
- Acapella (vocals) + Instrumental, both as WAV
- Stems
- 2 stems per song: vocals + instrumental
- AI model
- MDX-architecture model run with ONNX Runtime Web (WebGPU, WASM fallback)
- Privacy
- Audio files never leave your device
- First load
- ~67MB model download, cached in the browser afterwards
- Processing time
- Depends on device; desktop with WebGPU is fastest
- Works on
- Modern Chrome, Edge, Safari and Firefox; desktop recommended
- Offline
- Yes, after the model has been cached once
How to make a mashup in 3 steps
- 1
Extract Acapella from Song A
Upload Song A, let the AI isolate the vocals, and download the Acapella WAV.
- 2
Extract Instrumental from Song B
Upload Song B, let the AI remove the vocals, and download the Instrumental WAV.
- 3
Blend in your DAW
Import both WAV files into your DAW (Ableton, FL Studio, etc.), match the BPM using our tool, and align the beats.
Have a video instead of an audio file? Extract the sound first with Video to MP3. Need to cut a long track into shorter parts? Use the MP3 Cutter first.
What can you do with a mashup maker?
From club sets to TikTok edits, here is how DJs and creators use isolated stems to build mashups.
| Use case | What you can do | Output |
|---|---|---|
| DJ Club Sets | Create exclusive, high-energy transitions by layering a pop acapella over a techno or house beat | Download both stems |
| SoundCloud Bootlegs | Blend two popular songs into a brand new track for your SoundCloud or YouTube channel | Export WAVs |
| TikTok & Reels Transitions | Make a seamless audio transition between two songs for your short-form video content | Download stems |
| Remix Competitions | Extract stems if the original acapella isn't officially provided for a competition | Export acapella & instrumental |
| Party Playlists | Mix the vocal of one hit with the beat of another to create a custom party anthem | Download both |
| Music Production | Use the isolated acapella as a reference vocal or to sample a specific phrase | Download vocals.wav |
Who this mashup maker is best for (and when it is not)
Best for
- Fast, private stem extraction with no account or upload
- DJs and producers who need acapellas and instrumentals for mashups
- Creating bootlegs, edits, and transitions for social media
- Finding the BPM of both tracks to ensure perfect beatmatching
Not ideal for
- Separating 4+ stems (e.g., just drums or just bass). This tool outputs 2 stems only
- Very long tracks (over ~10 to 15 minutes) on phones or low-memory devices
- Studio-grade, artifact-free extraction of heavily layered or reverb-heavy vocals
- Commercial release of mashups without clearing the original copyrights
Ways to make a mashup, compared
There are several ways to get stems for a mashup. AI separation is the most reliable for modern songs because it learns what a voice sounds like, instead of relying on how the track was mixed.
| Method | Quality | Works best for | Limitations |
|---|---|---|---|
| AI separation + DAW (this tool) | High: clean vocals and beat + full DAW control | Most modern songs, any genre | Light bleed possible on dense mixes |
| Searching for leaked acapellas | Varies; often low bitrate | Popular mainstream hits | May not exist, may be unofficial, or low quality |
| Phase cancellation (center-channel removal) | Low to medium: depends on the mix | Old stereo recordings with a dead-center vocal | Removes bass and kick too; fails on reverb and stereo vocals |
| Upload-based online mashup tools | High | Heavier multi-stem models | Requires uploading audio; often account, queue, or paid plan |
Mashup glossary: stems, bootlegs, MDX, WebGPU
- Mashup
- A song created by blending the vocals of one track (acapella) with the instrumental of another. A staple of DJ culture and internet remix culture.
- Bootleg
- An unofficial remix or mashup, usually made by a fan or DJ without official permission. Often created for club sets or SoundCloud uploads.
- Acapella
- The isolated vocal track from a song, with all instruments and background music removed.
- Instrumental
- The backing track of a song with the vocals removed, leaving only the music.
- BPM
- Beats Per Minute. The tempo of a song. For a mashup to sound good, both songs usually need to be at the same or very similar BPM.
- DAW
- Digital Audio Workstation. Software like Ableton, FL Studio, or Logic Pro where you arrange and mix your mashup.
- MDX
- A neural-network architecture for music source separation that works on the audio spectrogram and is widely used for vocal isolation.
- WebGPU
- A modern browser API that gives web pages fast access to the graphics card, which makes AI audio separation several times faster than CPU-only processing.
Mashup maker not working? Try these fixes
How do I match the BPMs of the two songs?
Use the built-in BPM detection on both tracks. If they are different, use your DAW's warp/time-stretch feature to match the acapella to the instrumental's BPM.
The songs are in different keys
If the mashup sounds off-key, you will need to pitch-shift the acapella (or the instrumental) by a few semitones in your DAW until they harmonize.
The acapella has some beat residue
No AI separation is perfect. Heavily layered or distorted mixes can leave faint artifacts. Start from the highest-quality source you have (WAV or 320kbps MP3).
The tool is very slow or freezes
AI processing is heavy. Use a desktop or laptop with a modern GPU and a browser with WebGPU. On phones, long songs can take several minutes or run out of memory.
Browser says "Out of Memory"
Very long tracks (over about 10 minutes) can exceed browser memory. Split the song into smaller parts with our MP3 Cutter first, then process each part.
My file will not load
Use MP3, WAV, or M4A. If your file is a video, extract the audio first with our Video to MP3 tool.
ToolDeck vs upload-based mashup tools
Many online stem extractors upload your music to a server and queue it for GPU processing. ToolDeck keeps your files local and runs the AI in your browser.
| Feature | TToolDeck | Upload-based tools |
|---|---|---|
| Free with no account | Yes | Free tier, account often required |
| No file upload to a server | Yes | No |
| Runs AI locally in browser | Yes | no (server-side GPU) |
| No watermark on output | Yes | Varies by plan |
| Immediate processing start | Yes | Often queues for server |
| Works offline after first load | Yes | No |
| Extracts clean acapella & instrumental | Yes | Yes |
| Built-in BPM detection for beatmatching | Yes | No |
| Mobile friendly UI | Yes | Varies |
Competitor features vary by provider and plan. Based on commonly available behaviour; verify each tool before relying on it for professional work.
What you get for free
AI running locally
Powered by ONNX Runtime Web and an MDX-architecture model. Audio is processed in your browser using WebGPU for speed or WASM as a fallback.
Extract any stem
Get both the Acapella (vocals only) and the Instrumental (no vocals) from a single upload. Perfect for blending two songs together.
Instant BPM readout
The tool automatically detects the tempo of the instrumental so you can easily match it in your DAW.
100% private
Your unreleased bootlegs and personal edits stay on your machine. No uploads, no temporary server storage.
Auto-cached model
The ~67MB AI model downloads once and is cached by your browser, so later sessions start fast and can work offline.
High-quality WAV export
Stems export as uncompressed WAV, the best format for importing into Ableton, FL Studio, Logic Pro, Serato, or Rekordbox.
Tips for the best mashups
Respect copyright
Creating mashups for personal use, DJ sets, or non-commercial SoundCloud uploads is common. Releasing them commercially requires permission from the rights holders of both songs.
Use high-quality sources
The AI works best with a clean 320kbps MP3 or a WAV file. Low-quality or distorted files give poorer separation and more vocal artifacts.
Match the BPM in a DAW
Use the BPM detected by our tool to time-stretch the acapella to match the instrumental. Ableton, FL Studio, and Logic all have great warp/time-stretch tools.
Watch out for key clashes
Two songs can be at the same BPM but in completely different keys. If it sounds bad, try pitching the acapella up or down by a few semitones.
Clean up in your DAW
After importing, apply a gentle EQ or noise gate to the acapella to hide faint beat artifacts and make it sit better over the new instrumental.
How this tool works under the hood
The Mashup Maker decodes your audio with the Web Audio API, converts it into a spectrogram, and runs an MDX-architecture neural network through ONNX Runtime Web. With WebGPU it uses your graphics card; otherwise it falls back to WebAssembly on the CPU. The model predicts the vocal part, and the instrumental is the rest of the mix. A peak-detection algorithm then analyzes the instrumental to calculate the BPM. Both stems are written out as WAV files in memory and offered as downloads. No audio is sent over the network at any point; only the model file is downloaded, once.
Mashup Maker FAQ
Quick answers about privacy, BPM matching, key clashes, and copyright.
How do I make a mashup for free?
You need two things: the acapella of Song A, and the instrumental of Song B. Use our tool twice: first to extract vocals from Song A, then to extract the instrumental from Song B. Finally, layer them together in any DAW or audio editor.
Is my audio uploaded to a server?
No. The AI model runs inside your browser using ONNX Runtime Web with WebGPU or WebAssembly. Your audio file is never sent to ToolDeck or any third party, so it stays 100% private.
What if the two songs have different BPMs?
Use the BPM badge displayed next to the Instrumental track to see the exact tempo of both songs. If they differ, use your DAW's time-stretch or warp feature to match the acapella to the instrumental's BPM.
What if the songs are in different keys?
If the mashup sounds off-key, you will need to pitch-shift the acapella or the instrumental by a few semitones in your DAW until they harmonize. Some DAWs have automatic key detection to help with this.
Can I use the extracted stems in a commercial release?
Only if you own the copyright to both original audio tracks or have permission from the rights holders. Releasing a mashup of copyrighted songs without a license is copyright infringement. This is general information, not legal advice.
How good is the separation quality?
The MDX-architecture model gives clean results on most pop, rock, and hip-hop songs. Dense, heavily layered, or distorted mixes may keep faint bleed or artifacts.
What output format do I get?
Two uncompressed WAV files: one acapella and one instrumental. WAV is lossless, making it perfect for importing into Ableton, FL Studio, Logic Pro, Serato, or Rekordbox.
Does it work on iPhone or Android?
Yes, the interface is mobile-friendly, but AI processing can be slow and may run out of memory on older phones. For the best experience, use a laptop or desktop.
How large is the first download?
About 67MB for the AI model on first use. Your browser caches it, so later sessions start almost immediately.
Does it work offline?
Yes, once the AI model and page have been cached by your browser. The first load needs an internet connection to download them.
Can I remove vocals from a video?
Yes, in two steps. Extract the audio from your own video file with our Video to MP3 tool, then upload that audio to the Mashup Maker.
Which browsers are supported?
Recent versions of Chrome, Edge, Safari, and Firefox. Browsers with WebGPU are fastest; others fall back to WebAssembly and still work.
More free audio and video tools
Extract, compress, or edit media. Nothing uploaded, ever.
Your audio stays on your device
There is no upload step and no account. The AI model is downloaded to your browser and runs locally using WebGPU or WebAssembly. Your music never leaves your device. Read how we keep it private.