# lsdj-decomp: matching Little Sound Dj 9.4.2 reconstruction

> lsdj-decomp reconstructs Little Sound Dj 9.4.2 using tracked symbol maps, ROM analysis tools and C translations substituted into locally generated RGBDS assembly. The author reports an exact full-image comparison from a user-supplied ROM and 174 C functions matching 12,918 original bytes.

- Type: Case study
- Targets: App
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/tetrisgm/lsdj-decomp>
- Primary source: <https://github.com/tetrisgm/lsdj-decomp/blob/49b55fac028d2e1cb362d41f30c8de4b812143d6/README.md>
- Catalog page: <https://awesomerea.org/resources/lsdj-9-4-2-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/lsdj-9-4-2-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/lsdj-9-4-2-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** Supply a Little Sound Dj 9.4.2 ROM matching the stated SHA-1.
- **Prerequisites:** RGBDS 1.0.1, Make, Python 3 and the project-local GBDK toolchain are required.
- **Limits:** The author reports 174 matching C functions; the executable-code completion denominator has not been audited.
- **License:** The project tooling and imported maps are MIT licensed; the ROM and third-party toolchain retain separate terms.

## Primary sources

1. <https://github.com/tetrisgm/lsdj-decomp/blob/49b55fac028d2e1cb362d41f30c8de4b812143d6/README.md>
2. <https://github.com/tetrisgm/lsdj-decomp/blob/49b55fac028d2e1cb362d41f30c8de4b812143d6/docs/PROVENANCE.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.