# MelodySlotMachine — Dial-based melody generator

> AI-powered slot machine interface for generating and rearranging musical melodies. (iPhone/iPad app by newforestar co,.ltd.)

- Source: https://appshunter.io/ios/app/melodyslotmachine/id1559407284 (this page in markdown: same URL + `.md`)
- Developer: [newforestar co,.ltd](https://appshunter.io/developer/293922531)
- Category: Music, Entertainment
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 11.4 · 192 MB
- Languages: American English, Japanese
- Released: 2021-05-04
- Data updated: 2026-08-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/melodyslotmachine/id1559407284/reviews.md

## What is MelodySlotMachine?

Melody Slot Machine is an application developed by RIKEN towards the integration of music and AI. You can create new melody combinations by rearranging melody variations using slot dials. When the composer composes melody variations, the structure of the melody is analyzed using a theory of music known as generative theory of tonal music (GTTM). Even if the melody switches to another variation in the middle, the structure will not be disrupted. You can expand the possibilities of composition with Melody Slot Machine.

-	Dial operation
By rotating the dials similar to a slot machine, you can select a melody from multiple variations. The dial scrolls to the left as the performance progresses, and the leftmost dial on the screen represents the score of the performance currently being played.

-	Grid tile operation
The horizontal grid tiles below the dials show the dial changes throughout the song. Swipe up to expand and use the elongated grid tile.

-	Melody shuffle
When you shake your iPhone, all the dials rotate simultaneously, similar to when you pull the lever on a slot machine and stop at a random combination.

-	Song selection / Part switching
You can select a song by pressing the musical note button. For songs containing multiple parts, you can press the button to switch between parts.

-	Development history
The Music Information Intelligence Team, part of the  RIKEN Center for Advanced Intelligence Project, is exploring potential new ways of creating and listening to music using AI. The Melody Slot Machine is an example of next-generation music production and consumption in which AI automatically analyzes the structure of a melody and resynthesizes a new melody using the obtained structure. We aim to support composers in projects that require many variations, such as in movies and games.

The app is available to the public to gauge the overall interest in such a method of music creation. We ask that users the app who are prompted to fill out a questionnaire to please submit their responses. We plan to add songs in the future. If you are interested in the app and technology, please contact us at the support URL.

## Key features

- Dial-based melody variation selection
- Grid tile operation for timeline visualization
- Melody shuffle via device shake
- Song and part selection
- AI-driven musical structure analysis
- Next-generation music creation


## Frequently asked questions about MelodySlotMachine

### How does MelodySlotMachine generate new melodies?

MelodySlotMachine uses AI and a theory known as generative theory of tonal music (GTTM) to analyze the structure of existing melodies. It then allows users to rearrange melody variations using slot dials to create new combinations without disrupting the musical structure.

### What is the dial operation in MelodySlotMachine?

The dial operation is similar to a slot machine. By rotating the dials, you can select different melody variations. The leftmost dial represents the score of the performance currently being played as the dial scrolls left.

### Can I shuffle melodies in MelodySlotMachine?

Yes, you can shuffle melodies by shaking your iPhone. This action simultaneously rotates all the dials, stopping at a random combination, much like pulling a slot machine lever.

### Does MelodySlotMachine have ads?

No, MelodySlotMachine does not contain advertisements. It is a free application developed by RIKEN for exploring AI integration in music.

### What devices is MelodySlotMachine compatible with?

MelodySlotMachine is supported on iPhone and iPod devices. It is rated for ages 4+.

### How often is MelodySlotMachine updated?

MelodySlotMachine was last updated on May 4, 2021, with version 1.0.1. The developers plan to add more songs in the future.

### What is the user feedback on MelodySlotMachine?

Based on available data, MelodySlotMachine has received a 5.0-star rating from 1 review, indicating positive initial user sentiment.

### Is MelodySlotMachine suitable for professional composers?

Yes, MelodySlotMachine is designed to support composers, especially for projects that require numerous variations, such as in movies and games. It aims to expand compositional possibilities through AI.

## Version history (last 2 releases)

### 1.0.1 — 2021-05-04

Adjusting the sound source

### 1.0 — 2021-04-26

No release notes.

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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 2026-08-16.*