BmsTWO Wiki

BmsTWO is a continuation fork of BmsONE, an editor for bmson charts. This wiki documents the features added in the BmsTWO fork — what they do, how to use them, and a short note on how each is implemented.

These pages are maintained in the repository under docs/ and mirrored to the GitHub wiki. Edit the files in docs/ and the wiki is updated from them.

Contents

• Editing & Navigation — copy/paste, fill, bar division, BGA, STOP, long notes, keysound lock, MIDI import, Go To, richer selection.
• Panels & Workflow — Statistics, Charts, Keysounds, and Selection docks; the sabun (chart-variation) workflow.
• Classic BMS Mode — a usable layout and charting flow for pre-cut-sample songs with hundreds of keysound channels.
• bmson Extensions — the non-standard fields BmsTWO adds (up, x_stop, x_color) and how to implement them in a player.
• Autosave & Shortcuts — autosave / crash recovery and configurable keyboard shortcuts.
• Appearance — the modern dark theme and rendering options.
• Implementation Notes — architecture, the Qt 6 port, crash handling, and testing (for contributors).

A note on docks

Most of the new panels are dock widgets. They are off by default; enable any of them from View → Views, then drag/tab/float them like any Qt dock. Your layout is remembered between sessions.

How this fork is built (transparency)

BmsTWO is developed as a human-directed, AI-assisted project: the maintainer sets the goals, makes the design decisions, and validates the app in practice, while an AI coding assistant (Anthropic's Claude, via Claude Code) does most of the implementation and automated checking. See the README for the full disclaimer.

A note on "Classic" vs "Modern"

BmsTWO ships a Modern dark theme that is on by default, plus a Classic mode that restores the original BmsONE look exactly. Toggle it in Preferences → General → Modern dark theme (requires restart). See Appearance.

(Not to be confused with Classic BMS Mode, which is a charting workflow for pre-cut-sample songs, unrelated to the theme.)

This page is synced from docs/Home.md in the BmsTWO repo.