Mod The Coaster

Groove Coaster modding utilities.

modding guide · song list spreadsheet

Tools (STEAM)

AAR Zip

Packs .aar archives. ST stores most of its files (including charts) in .aar files.

List	Unpacked

ASN Snip

Converts .asn audio to .ogg by trimming header. ST stores its audio in .asn files, which are just .ogg audio files with a 32 byte header. ST will accept standard .ogg the same as .asn.

Table Tune [NEW!]

Re-assign difficulties of existing songs in TableTune.aar. NOTE: only works on uncompressed TableTune files.

• uncompressed file should be 392 KB instead of 112 KB, and in a hex editor, the first 4 bytes should say "ALAR" instead of "ALLZ"
• use Aqualead LZSS Decoder to decrypt

Tools (SWITCH)

Jacket Convert

Converts AC jackets to SW jackets. SW uses a different jacket layout than other versions, and jackets will look stretched unless converted.

Before	After

Running Locally

Most things should work while running locally.

However, these functions will not work unless hosted on a local webserver.

• Jacket Converter tab
• Mute SHOT option in AAR Zip

Dependencies

JSZip v3.10.1

simFile v2024.2.19

tabs v2024.11.15

Mod The Coaster ♡ lemocha 2024