Start with video or audio
Choose a video from Photos or a local audio file. Audio extraction and separation continue on your device.
- Photo-library video
- Local audio file
- Recent result history
On-device vocal and instrumental separation
One recording.Two useful tracks.
Import a video from Photos or a local audio file. Separate vocals and accompaniment on your iPhone or iPad, preview the result, adjust each level, and export without uploading the source file.
- On-device
- Photo-library video
- Fast / Fine modes
- Export results
Feature illustration
9:41
ShengXi
Source audio03:28 · local file
Vocals72%
Instrumental84%
●Source stays on your device
A focused workflow
From import to export, without unnecessary steps
ShengXi focuses on two-track separation. Choose a source and processing mode, then preview vocals and accompaniment independently. Interface graphics on this page are feature illustrations, not pixel-perfect screenshots.
Fast and Fine modes
Use Fast mode for a quick check, then Fine mode when the source needs a more careful pass. Time and quality vary by source.
- Quick preview
- Fine processing
- Honest quality limits
Preview each result
Listen to the mix or adjust vocal and instrumental levels independently, then save, share, or remove recent results.
- Mixed preview
- Independent levels
- Save and share
Three simple steps
Spend more time practicing and creating
Choose a source
Select a video or audio file you have permission to process.
Separate on device
Pick Fast or Fine mode. Your source does not need to be uploaded.
Preview and export
Listen to each track, adjust levels, and save or share the result.
Built for real tasks
A simpler step in your audio workflow
Covers and singing practice
Create a practice backing track from music you are permitted to use.
Music study
Hear vocals and accompaniment separately to study melody, rhythm, and arrangement.
Short-video audio
Prepare separate voice or background tracks from footage you own or are licensed to edit.
Private local work
Process recordings and unreleased material without sending the source to a server.
Local-first processing
Your source does not need to leave your device
Audio extraction, model separation, and export are completed on device. You are still responsible for having permission to process and publish any music or video you use.
Solve one specific problem
Browse all guides →Latest guides
The first practical guides are being prepared.
Solve one specific problem
Popular topics
Vocal removerBacking tracksRemove vocalsVideo audioOffline processingCover practice
Know before you process
Frequently asked questions
Will every song separate perfectly?
No. Mixing, compression, noise, and source quality can leave artifacts or change tone.
Is my source uploaded?
No. The current version extracts, separates, and exports audio on device.
What can I import?
Videos from Photos and local audio files. Exact selectable formats depend on iOS and the current app version.
Which mode should I use?
Try Fast mode first, then Fine mode when you want a more careful pass.
Feedback and support
developer@leleyes.comTell us the source type and device when something goes wrong
Do not email full songs you are not allowed to share. File type, device model, and OS version are usually enough to start troubleshooting.