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@nmlgc nmlgc released this 09 Mar 15:38
P0275
9dcad64

BGM can now be modded via BGM packs in the bgm/ subdirectory! Each track is identified by its two-digit Music Room number, followed by the extension – for example, the MIDI version of the title screen theme would be 01.mid. This was mainly implemented for in-game support of SC-88Pro recordings on future operating systems without a native MIDI synth.
"Screenshot of the BGM pack selection menu introduced in the Shuusou Gyoku P0275 build, highlighting the <Download> option.

Due to new filesystem- and threading-related code, this release requires Windows Vista or later, and no longer comes with an i586 build. If you are interested in continued official support for earlier Windows versions, feel free to provide funding or code contributions for #43, #53, and/or #58.

The detailed changelog:

BGM packs

  • BGM packs introduce support for waveform BGM. The system is based on thcrap's BGM modding support, with the following key differences:

    • Only FLAC (.flac) and Ogg Vorbis (.ogg) codecs are supported, with .flac taking precedence over .ogg.

    • Stacking is not supported.

    • Each track can be provided in waveform and MIDI versions. If both are present, the MIDI version is silently processed in the Music Room to provide note and spectrum analyzer visualization. This assumes that both waveform and MIDI files are perfectly synchronized with each other.

    • Track titles for in-game and Music Room display are taken from the Vorbis comment TITLE tag of the intro file.

  • Waveform tracks can provide a gain factor to optionally remove any volume differences between individual tracks of a BGM pack. This factor is read as a floating-point value from the optional GAIN FACTOR tag of the intro file.

    • The configuration menu disables the BGMVolNormalize option if the currently playing track does not define a gain.

  • Waveform tracks can link themselves to a MIDI file from the original MUSIC.DAT soundtrack. This allows recordings of these MIDIs to retain the original Music Room visualizations without needing to bundle the original file in the BGM pack and thus infringing copyright. This is done by providing the full 32-byte BLAKE3 hash of a MIDI file in the optional SOURCE MIDI tag of the intro file.

  • If no BGM pack is present, the Sound / Config menu provides a download option for SC-88Pro recordings of the original soundtrack. Currently, this simply opens a web page in the system's default browser.

General sound- and music-related changes

  • BGM and sound effect volume can now be adjusted in-game, separately from each other. The controls in the Sound / Config menu are modeled after the MIDI standard, using a squared volume curve with a range between 0 and 127. Unlike in Windows Touhou, the BGM volume setting also applies to MIDI.

    Screenshot of the Sound / Music menu of the Shuusou Gyoku P0275 build, showing off the new volume control and BGM pack selection options.

  • The in-game music title animation is no longer shown if BGM is disabled.

  • In-game music titles are now consistently right-aligned.
    Leading whitespace in 4 of the original MIDI Sequence Names suggests that pbg might have intended these titles to be centered within the 216 maximum pixels that the original code designated for music titles, but none of those had the correct amount of spaces that would have been required for exact centering. The code did have a formula for right alignment though, so this fix maintains consistency with the whitespace-trimmed title tags in the BGM packs. For shorter titles, this slightly changes the look of the animation; this might be fixed with #55.

    Original game:

    2024-03-09-SH01-Ingame-music-title-original.webm

    P0275 build:
    2024-03-09-SH01-Ingame-music-title-P0275.webm

MIDI playback

  • The original MIDI soundtrack from MUSIC.DAT now seamlessly loops instead of restarting at the end of each MIDI file. The necessary loop points were algorithmically detected using mly and are hardcoded into the executable as a map that associates the BLAKE3 hash of each individual MIDI file with a loop region.

  • Re-enabling MIDI BGM in the Sound / Music menu will now immediately play the title screen theme again.

  • MIDI files now play at their exact notated tempo.
    Shuusou Gyoku's original MIDI parser had an arithmetic error that caused every tempo value to be parsed as roughly ≈0.8% / ≈1 BPM slower than notated. As a result of pbg's Program Support role during the development of TH06, this bug is also present in every Windows Touhou game that supports MIDI playback.

  • The MIDI Port configuration option now shows a simple grayed-out > if BGM is disabled. Previously it showed ^^^^^^^^^^, which lined up with the 使用しない string from the MIDI option above, but this no longer works with the new BGM-related options between the two.

  • When the game window regains focus after losing it, MIDI playback now resumes at the exact position it was paused, instead of rewinding to the beginning of the track.

  • The MIDI TIMER in the Music Room now shows the current MIDI pulse value.
    In the original game, it simply showed the PASSED TIME value formatted in milliseconds. While this revealed the 10ms update interval of the game's MIDI player, it didn't provide any further information that related to the actual MIDI file being played. In contrast, the MIDI pulse value will jump back when reaching the loop point while the PASSED TIME value continues to increase in that case.

Menus

  • If any of Shuusou Gyoku's 5 original game data files are missing, the game now shows a new screen at startup with the full absolute paths to the .DAT files and an option to recheck without restarting the game. This means that the game will now at least show something if it's started by itself from any directory – previously, it simply crashed on the first attempt to load anything from a nonexistent .DAT file.

    The new 'missing game data' screen shown at startup in the P0275 build of Shuusou Gyoku, listing any missing files at their absolute directories and offering the possibility to recheck their existence without quitting the game.

  • The main menu help text now appears centered rather than left-aligned next to a nonexistent face sprite.

Troubleshooting

As of the P0256 build, D3DWindower can no longer be used with the SDL2/non-i586 version, but DxWnd still works. Import this configuration via File → Import, then adjust the path to your GIAN07.exe.

If the game runs slow on your system, or doesn't render anything at all:

  • Delete any reference to GIAN07.exe from the following registry keys:

    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
    • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers

  • Make sure that the 32-bit mode is activated in the Config → Graphic menu.

Additional credits

  • Elfin: English→Japanese localizations
  • Verinna: Spanish localization for BGM placement files

Summary blog post: https://rec98.nmlgc.net/blog/2024-03-09
Full changelog compared to the previous release: P0256...P0275
Previous release: https://github.com/nmlgc/ssg/releases/tag/P0256

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