DarkSouls-like BGM Generator — RPG Maker MZ

KNELL forges original soulslike music — bells, choirs, and dread — entirely from scratch, right in your browser.

🎼 Part of the Background Music Generators collection → https://itch.io/c/8090376/background-music-generators 

80+ generators · bundle deals · new tools added regularly · every note in the collection trailer was generated by these tools.

Point it at a mood, shape three dials, and it composes and synthesizes a dark-fantasy loop with no samples and no repetition. It’s a dev tool: make a track, export it, and drop it into your game. Your loops are original and yours to ship.

What makes it different

• Real synthesis, no samples. Every sound — the wordless choir, the tolling bells, the low brass — is generated live with the Web Audio API. Tiny, original, license-free output.
• A dissonance system, not just “minor key.” Chords move through consonance to tone-clusters and tritones on demand, with cinematic swells and a slow-building dynamic arc (that sparse pp → overwhelming ff FromSoft climb).
• Ten scenes, each its own darkness: Grace, Vigil, Catacombs, Cathedral, Boss, Colossus, Legion, Mire, Frenzy, Abyss.
• Ostinato churn in odd meters (5/4, 7/8, 6/8, 4/4) for that ritual, off-kilter battle feel.
• A from-scratch cinematic orchestra: strings (legato + tremolo), low brass, pipe organ, tolling church bells, timpani, taiko, gongs, martial snare, and a lone grieving piano.

You’re in control

• Intensity — from a sparse funeral to an overwhelming boss wall.
• Dissonance — from mournful and consonant to clashing and harrowing.
• Choir — how present the voices sit in the mix.
• Plus Key, Tempo (Auto / Funeral / Frenzied), and Length.
• Reshuffle rolls a fresh seed — new scale, tempo, meter, orchestration and arc every time, so you’re never handed the same track twice. The seed + sliders reproduce any piece exactly.

Export & drop in

• .ogg — game-ready, with LOOPSTART / LOOPLENGTH loop tags baked in. Drop it into your project’s audio/bgm/ folder and RPG Maker (MZ and MV) loops it seamlessly.
• .wav — uncompressed, for editing in a DAW.

Good to know

Runs offline in any modern browser — nothing installs, nothing uploads. A short README with full instructions is included.

KNELL emulates the style and techniques of dark-fantasy game scores; it does not contain or reproduce any existing music, and is not affiliated with or endorsed by FromSoftware, Bandai Namco, or any other rights holder.

FAQ (paste at the bottom of the Description, or use as its own section)

Is the music royalty-free? Can I use it commercially? Yes. Everything KNELL exports is original and yours to use in commercial or free projects, no attribution required. A credit (“Music forged with KNELL”) is appreciated but optional.

Does it use samples or copyrighted audio? No. Every sound is synthesized from scratch with the Web Audio API. No samples, no external assets, and it never reproduces any existing track — it emulates a style.

Will the loops actually loop seamlessly in RPG Maker? Yes — export the .ogg. It carries LOOPSTART/LOOPLENGTH tags that MZ and MV read to loop with no gap. (The .wav has no loop tags; use it only for DAW editing.)

MZ only, or MV too? Both. They both read .ogg for BGM. Put the file in audio/bgm/.

Do I need to install anything or be online? No. It’s one .html file. Download it, open it in a browser, work offline forever.

How do I get the exact same track back later? Note the seed shown on screen and keep your three slider values. Re-enter them and you’ll get an identical render.

No sound when I open it? Click Play once. Browsers block audio until you interact with the page.

The OGG button says the encoder didn’t load. Refresh and try again. As a fallback you can export the .wav and convert it with ffmpeg -i track.wav -c:a libvorbis track.ogg — but that won’t add loop tags, so prefer the built-in OGG export.

Is this “AI music”? The composition and sound are produced by hand-written procedural DSP code — not a generative-audio AI model. The tool’s code was developed with LLM assistance, which is disclosed above.

Feedback, Support & Custom Development

Thank you for checking out this project! If you use this plugin, I’d greatly appreciate it if you could leave a review describing your experience. Your feedback helps improve future updates, assists other developers in making informed decisions, and supports continued development.

If you have any questions, bug reports, feature suggestions, or run into any problems while using this plugin, please don’t hesitate to contact me.

I’m also available for custom RPG Maker plugin development. Whether you need a completely new plugin, modifications to an existing one, compatibility fixes, or help implementing a unique gameplay system, I’d be happy to discuss your project.

📧 Contact: rpgmakerplugins@protonmail.com

I do my best to respond as quickly as possible and look forward to helping you bring your ideas to life. Thank you for your support!