Hatsune Miku: Project DIVA Mega Mix

Hatsune Miku: Project DIVA Mega Mix
Also known as: Hatsune Miku: Project DIVA MEGA39's (JP) Developers: Sega, Crypton Future Media Publisher: Sega Platform: Nintendo Switch Released in JP: February 13, 2020 Released in US: May 15, 2020 Released in EU: May 15, 2020 This game has unused code. This game has unused graphics. This game has unused models. This game has unused sounds. This game has unused text. This game has a prerelease article

Hatsune Miku: Project DIVA Mega Mix is a "greatest hits" compilation of songs from Future Tone for the PlayStation 4, with a toon shader applied onto the graphics to tie in with the franchise's 10th anniversary. It's also the first Project DIVA game to be released on a non-PlayStation console.

The game is a port of Future Tone for the PlayStation 4, as it still uses files and directories from it such as rom_ps4.

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Prerelease Info

Unused Text Catch the wave!

Unused Graphics

Check.bntx

Leftovers from the Nintendo SDK.

RhythmGame.bntx

This file contains early sprites of the game's new rhythm game mode, Mix Mode.

Early hit labels.

Early Joy-Con icons.

An early Combo font.

Early font meant for the score, which is also the one used in Project Mirai.

Early combo font.

Another early score font.

Another early combo font. Compared to the final version, the outlines are brighter.

A straight lane.

An early version of a note called "free".

At some point, Mix Mode was going to use sprites for the song text instead of using the names from pv_db.txt. The songs here are Dear, Decorator, Melt, Rolling Girl, Romeo & Cinderella, Sakura no Ame, Senbonzakura, and The Disappearance of Hatsune Miku. Dear's file name, title_dear, is still referenced in half of Mix Mode's chart files. Decorator's, title_decorator, is also still referenced in its Mix Mode chart files.

spr_gam_cmn

The gameplay skins for Future Sound and Colorful Tone are still present.

spr_gam_cmnmix

A "Xross Bonus" is present in the sprite sheet, which goes unused.

spr_gam_pv995

This is a placeholder PV. The Japanese text says "Temporary Title".

spr_nswgam_adv

A leftover from Project DIVA Future Tone. In Mega Mix, the SEGA logo is a video file.

spr_nswgam_gallery

Icons and preview images exist for all 4 of the Arcade openings in Mega Mix's UI style. These are viewable in Future Tone, but the videos are not present in Mega Mix's gallery page and in the game's romfs. However, the files are still referenced in the game's code.

Text sprites exist for them as well, also being fitted for Mega Mix's UI style.

spr_nswgam_trialdemo

Leftover from a trial version of the game.

spr_sel_pv069

For some reason, a song select sprite for PV069 was added in, as this slot never even had a song. It is just a copy of Love is War's song select sprites.

spr_sel_pv278

An early song background for 39 Music!, which more resembles the old version of the PV. In JP 1.0.5 and ENG 1.0.2, PV278 is used by Bless Your Breath. However, the song selection sprites are instead loaded from the DLC data.

Aet File

In the English version only, there's an aet file called aet_nswgam_test.bin that appears only in rom_switch_en. It has no sprites, but it does have an animation in it. The sprite name in the file is NSWGAM_TEST_CURSOL_RIGHT_OUTER. The file itself doesn't exist in the Japanese version, but has entries in aet_db.bin.

Unused Code

Arguments

To do: Add the rest of the arguments.

The game can load with arguments, which can be added to args.txt in the root of the game's romfs. Several new arguments were added into Mega Mix, which are:

• -pv_full_open - Removes song restrictions in the eShop demo.
• -no_local_rom - Unknown
• -pcv - Unknown
• -no_npr - Disables loading of add_param.
• -magical_mirai - This boots the game to the same demo mode that was at Magical Mirai. The only songs available in this demo are Alien Alien, Rolling Girl, and Freely Tomorrow.
• -tgs - Used for demos at Tokyo Game Show. This acts the same as -magical_mirai, except Dreamin Chuchu is now a part of the song select.
• -ui_ps4 - This boots the game using Future Tone's UI. If enabled, the game crashes whenever a song that has a mix mode chart is selected (which is every song that's present, this can be fixed by removing the song's entry from *pv_db_switch.txt). This is also a way to view the deleted Arcade openings, if the video files are added back in.
• -exhibition_full_open - Removes song restrictions in the TGS and Magical Mirai demo.
• -pv_selector_switch - Unknown
• -phase - Unknown
• -earlyz - Unknown
• -no_sss - Unknown

Developer Tool Leftover

Within DLC Pack 8, there are two files in rom_switch_dlc/dlc8/rom/script/mixmode named pv_db_switch_convert with the extensions of csv and exe. Looking into the csv gives the listing of every song in the game, including ones part of the 2nd season pass which were not released yet at that time.

Opening Leftovers

A couple files and some of the database files, reveals that there was a song slot PV988. However, this slot was actually used to create the game's opening. For example, one of the motion names in mot_db is PV988_CTW_P1, CTW being short for Catch the Wave, and a texture file name in tex_db is F_DIVA_STGPV988_IN_REDCAR_SDW01, referring to the red car's shadow texture from the Miku and Meiko scene. The only actual file left from the opening is a toon shader lighting file, pv_988.adp.