# QSDT

> Text-based music sequencer and instrument playable via keyboard. (iPhone/iPad app by Brian Wu.)

- Source: https://appshunter.io/ios/app/qsdt/id1554966737 (this page in markdown: same URL + `.md`)
- Developer: [Brian Wu](https://appshunter.io/developer/1554966739)
- Category: Music, Music, Games, Casual
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 13.4 · 4 MB
- Languages: English
- Released: 2021-02-23
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/qsdt/id1554966737/reviews.md

## What is QSDT?

QSDT is both a text-based music sequencer as well as an instrument you can play with your keyboard! The layout of the keys is similar to the B system layout of a chromatic button accordion.

Things you can do with the app:

- Play songs using your keyboard

- Compose musical pieces using text

- Compete for a high score in the rhythm game mode

- Type to the cacophonous sound of words

## Key features

- Text-based music sequencing
- Keyboard instrument play
- Rhythm game mode
- Compose musical pieces
- Unique key layout


## Frequently asked questions about QSDT

### What can I do with QSDT?

QSDT allows you to play songs using your keyboard, compose musical pieces using text, and compete in a rhythm game mode. It functions as both a text-based music sequencer and a playable instrument.

### How does QSDT's keyboard layout work?

The layout of the keys in QSDT is designed to be similar to the B system layout of a chromatic button accordion, offering a unique way to interact with the music.

### Is QSDT available on Android devices?

Based on the provided information, QSDT is supported on iPhone, iPad, and iPod. Support for Android devices is not specified.

### What is the age rating for QSDT?

QSDT has an age rating of 4+, making it suitable for a wide range of users.

### How often is QSDT updated?

QSDT was last updated on February 23, 2021, with version 1.0. Further update frequency information is not available.

### Does QSDT have ads?

No, QSDT does not contain advertisements. The app is free to download and use without any ad interruptions.

### What are the user reviews like for QSDT?

QSDT has received excellent user feedback, holding a perfect 5.0-star rating from 2 reviews.

### Can I compose music with QSDT?

Yes, QSDT enables you to compose musical pieces using a text-based interface. It also functions as a playable instrument.

## Version history (last 1 release)

### 1.0 — 2021-02-23

No release notes.

## Apps similar to QSDT

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Accordion Chromatic Button](https://appshunter.io/ios/app/accordion-chromatic-button/id6502722726) | 4.9 (34) | Free | Music |
| [Undulator](https://appshunter.io/ios/app/undulator/id1463822021) | 4.1 (9) | $3.99 | Music |
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| [Maver: Compose MIDI anywhere](https://appshunter.io/ios/app/maver-compose-midi-anywhere/id6443457413) | 5.0 (1) | Free | Music |
| [PolyHarp](https://appshunter.io/ios/app/polyharp/id961772600) | 4.9 (11) | $4.99 | Music |

## Related topics

[qsdt](https://appshunter.io/ios/topics/qsdt)

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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 2026-06-05.*