# Prism4music — Separate Vocals & Instruments

> Music and video separation into vocals and instruments with playback controls. (iPhone/iPad app by Kitt Peak, Inc..)

- Source: https://appshunter.io/ios/app/prism4music/id6504075908 (this page in markdown: same URL + `.md`)
- Developer: [Kitt Peak, Inc.](https://appshunter.io/developer/399507326)
- Category: Music
- Price: Free with in-app purchases
- Rating: 5.00/5 from 8 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 446 MB
- Languages: American English, Japanese
- Released: 2024-07-08
- Data updated: 2026-08-15
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/prism4music/id6504075908/reviews.md

## What is Prism4music?

Separate music and video into vocals and various instruments. For karaoke or instrumental practice.

1. Prism4Music is the Prism for Music.
Vocals, bass, piano, guitar, drums (snare, bass drum, cymbals, toms), and can be separated into 9 tones.

2. Also supports Video.
Enjoy your favorite music videos while using for karaoke or instrument practice.

3. Music Source Separation Technology
Prism4music has achieved state-of-the-art sound source separation by customizing and incorporating 'Demucs' known for its superior sound source separation technology, for the iPhone.
Implemented as parallel processing, allowing seamless music playback even during conversion.

4. Import music files (including videos) such as mp4, mov, m4a, mp3, wav, etc. from the Music, Files, and Photos apps.
The free version can only isolate the first 60 seconds of a file (limit can be removed with in-app purchase).

5. Each separate tone can be turned on/off individually and the volume can be adjusted.

6. Pitch shift (raise or lower the key by a semitone) and time stretch (increase or decrease the speed without changing the pitch) are also available.

7. Pinch and Pan
You can pinch a graph with two fingers to expand it, or pan it back and forth with two fingers to the left or right.

8. Playback History
Instantly open previously separated music using cache.
Key, tempo, and AB repeat settings are also recorded.
The free version allows up to 2 playback history entries, while the premium version has no limit.

9. Automatic BPM detection and BPM specification function (in-app purchase)
Automatic BPM (beats per minute) detection when music files (including videos) are loaded.
Based on this BPM, the tempo can be set to a higher or lower level. Please use this function for practicing musical instruments.

10. Export function of separated songs (in-app purchase)
The Premium version can export separated songs.

## Key features

- Separate vocals and instruments
- Supports video files
- Pitch shift and time stretch
- Adjustable tone volume
- Playback history
- Automatic BPM detection

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Preminum Edition | $4.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/prism4music/id6504075908/reviews.md

### 5/5 — Local splitting!

*2026-06-08*

Splits files locally so you don’t need a subscription!

### 1/5 — 音源の読み込みができない

*2026-04-08*

バージョンアップ後音源の読み込みができず、実質アプリが使えなくなってしまいました。課金もしているので早急に対応をお願いしたいです。

### 2/5 — 音楽を読み込むボタンが反応しづらくなった

*2026-01-27*

追記:バージョン1.1.3にアップデートしたところ音楽を読み込むボタンが"プレイ""再生履歴"のタブに判定が吸われてしまってほとんど反応しなくなってしまいました
早急に修正お願いします
使用機種:iPhone 16 Pro Max iOS26.2


音源分離自体は満足だったので課金しましたが
できればバックグラウンド再生とステレオ再生にも対応して欲しいです
特にバックグラウンド再生出来ないのは余りに不便すぎるので最低限こちらだけでも対応していただけると助かります

### 2/5 — カス

*2025-11-18*

アプリ落ちるゴミこんなカス使うな

### 1/5 — Version Premium ne démarre plus !!! (Mise a jour de commentaires)

*2025-06-12*

Attention, la version Premium est limitée à 5mn et l’application semble être assez lente pour effectuer la conversion.
J’espère qu’une mise a jour pourra corriger rapidement ces problèmes qui ne devraient normalement pas exister pour une version payante.
Sinon l’idée est plutôt bonne et je mettrai mon commentaire à jour suivant l’évolution (ou non) de l’application.

Mise à jour de commentaires (12/06/25) :
Finalement maintenant l’application (payante 🫩) ne démarre carrément plus du tout ! 🙄
A suivre…

### 4/5 — Great app

*2025-03-19*

This app works great except for isolating bass guitar. That’s my only criticism tho, it’s very user friendly and works well. I now have the premium version which was well worth the one time payment of £4.99

### 4/5 — ギターの部分が惜しい

*2025-01-21*

この手の他のアプリは月額料金で販売ですが、こちらは落としきりなのでありがたいです。
分離も概ね満足していますが、ソロギターとバッキングギターを分けて消す事ができません。
ギター1とギター2を分けて分離できるようになれば素晴らしいアプリだと思います。

ぜひ機能追加よろしくお願いいたします。

## Frequently asked questions about Prism4music

### What can Prism4music separate from music and video?

Prism4music can separate vocals, bass, piano, guitar, and drums (snare, bass drum, cymbals, toms) into up to 9 tones. It also supports video files for karaoke or instrumental practice.

### How does Prism4music handle file length limitations in the free version?

The free version of Prism4music limits the isolation of music files to the first 60 seconds. This limitation can be removed with an in-app purchase.

### Can I adjust the volume of individual instruments or vocals in Prism4music?

Yes, each separated tone in Prism4music can be individually turned on or off, and its volume can be adjusted to your preference.

### What are the playback history limits in Prism4music?

The free version of Prism4music allows up to 2 playback history entries. The premium version offers unlimited playback history.

### Does Prism4music have ads?

No, Prism4music does not contain advertisements. It is ad-free.

### What devices is Prism4music compatible with?

Prism4music is available for iPhone, iPad, and iPod. It has an age rating of 4+.

### How often is Prism4music updated?

Prism4music was last updated on May 13, 2026, indicating a recent release or update. The current version is 1.1.4.

### What is the user sentiment for Prism4music?

Prism4music has received a high rating of 5.0 stars from 7 ratings, suggesting very positive user sentiment.

## Version history (last 5 releases)

### 1.1.4 — 2026-05-13

Fixed an issue where the Music Import (music note) button became difficult to tap after an OS update.

### 1.1.3 — 2026-01-26

Resolved a DC offset issue: Fixed a bug where separated waveforms would shift from the center line.
Enhanced Output Accuracy: Audio waveforms are now properly centered, ensuring more accurate amplitude and higher quality output for post-processing.

### 1.1.2 — 2025-06-20

Fixed a rare crash caused by memory exhaustion when separating long audio tracks.

### 1.1.1 — 2025-01-29

Fixed issues on iOS 18 iPads.
Added a feature to export each stem as a separate solo track.
Added the ability to set the start (A) and loopback (B) points individually for AB Repeat.

### 1.1.0 — 2024-08-07

V.1.1.0
1. Now compatible with iPad.
2. Added playback history feature.
Instantly open previously separated music using cache. Key, tempo, and AB repeat settings are also recorded.

## Apps similar to Prism4music

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Vocal Remover Music - AI Vocy](https://appshunter.io/ios/app/vocal-remover-music-ai-vocy/id6736978180) | 1.0 (1) | Free | Music |
| [Vocal Remover - Music Remover](https://appshunter.io/ios/app/vocal-remover-music-remover/id6748838394) | — | Free | Music |
| [AI Vocal Remover](https://appshunter.io/ios/app/ai-vocal-remover/id6738619495) | — | Free | Music |
| [Drums Extractor - for musician](https://appshunter.io/ios/app/drums-extractor-for-musician/id1471602693) | 3.9 (27) | Free | Music |
| [ExtVocal Pro - Spatial Audio](https://appshunter.io/ios/app/extvocal-pro-spatial-audio/id1561597264) | 4.3 (10) | Free | Music |

## More apps by Kitt Peak, Inc.

- [Trans4motor - Engine Simulator](https://appshunter.io/ios/app/trans4motor-engine-simulator/id899277186)
- [Trans4motor S](https://appshunter.io/ios/app/trans4motor-s/id1561448237)
- [Endless PiP](https://appshunter.io/ios/app/endless-pip/id1617492426)
- [Trans4motor R](https://appshunter.io/ios/app/trans4motor-r/id6739180076)

All apps by Kitt Peak, Inc.: https://appshunter.io/developer/399507326

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*