🔊 Expanded Cave Sounds

50 new atmospheric, sometimes haunting, cave ambience SFX — mixed in alongside the vanilla pool, with optional full replacement.

Overview

Minecraft ships with only 13 ambient.cave sounds. Spend enough hours underground and you'll know every creak and groan by heart. Expanded Cave Sounds hooks directly into the game's existing cave-mood system and lifts the rotation from 13 sounds to 63 — without changing when the ambience fires, how it fades in, or where it positions itself in 3D space.

Nothing is louder. Nothing is more frequent. You just hear something new the next time it plays.

Features

• 50 new mono Ogg Vorbis tracks — mastered at 44.1 kHz, quality 5, for clean positional audio through OpenAL
• Blends with vanilla by default — both pools rotate together; no vanilla atmosphere is lost
• One-flag pure-expanded mode — flip a config boolean for expanded-only
• Zero gameplay changes — same trigger cadence, same darkness/biome rules, same soundPositionOffset
• Client-side only — drop it in; servers do not need it
• Tiny footprint — ~3.6 MB total, a single Mixin, no runtime reflection, no per-tick polling
• Plays nicely with immersion mods — Sound Physics Remastered reverb and Presence Footsteps are untouched
• No required dependencies — Fabric API is not needed

How It Works

The mod does not re-implement cave ambience. It lets vanilla continue doing what it already does — sampling a random block in a 17×17×17 cube around the player each tick, incrementing a mood counter when dark enough, and dispatching minecraft:ambient.cave at a randomly-jittered offset position.

At the exact moment Minecraft calls SoundManager#play with that cave sound, a Mixin intercepts the dispatch and decides what happens:

Because the hook is at the dispatch site rather than the upstream mood pipeline, every vanilla tuning knob — biome tickDelay, blockSearchExtent, soundPositionOffset, subtitle category, reverb from downstream mods — keeps working unchanged.

Configuration

A plain JSON config is written to .minecraft/config/expandedcavesounds.json on first launch:

{
  "playVanillaCaveSounds": true
}

Restart Minecraft after editing the file.

Compatibility

• Java: JDK 17 (bundled with every standard Minecraft launcher)
• Side: client-only — nothing to install on the server
• Required mods: none. Fabric API is not a dependency.

Installation

1. Pick the jar from the Files tab that matches your loader.
2. Drop it into your .minecraft/mods/ folder.
3. Launch the game and load any world.
4. Head underground — the expanded rotation kicks in the first time the vanilla mood counter trips (darkness plus roughly five minutes of in-game time).

Modpack Permissions

Free to include in any modpack, public or private, monetised or not. Credit is appreciated but not required. A link back to this CurseForge page helps route feedback upstream.

FAQ

Does it work on a multiplayer server?

Yes. The mod runs entirely on the client — each player hears their own soundscape. Install it only on the clients that want the expanded ambience. Servers require no changes.

Does it replace the vanilla cave sounds?

Not by default. In the default configuration, vanilla's 13 sounds still play — the mod simply adds 50 more to the rotation. Set playVanillaCaveSounds to false if you prefer expanded-only.

Does it conflict with AmbientSounds, Dynamic Surroundings, or Sound Physics Remastered?

No. The Mixin intercepts only dispatches of minecraft:ambient.cave. Other ambient layers — biome ambience, reverb/DSP, weather — are completely untouched. Sound Physics reverb in particular works unchanged because the mod replaces the source sample, not the dispatch pipeline.

Will it change how often I hear cave sounds?

No. The vanilla mood sampler still decides when a sound plays. The mod only decides which sound that dispatch uses.

Roadmap

• v0.2 — Y-band and biome-aware pools (deep dark, dripstone caves, lush caves)
• v0.3 — Cloth Config screen, in-game volume slider, vanilla/expanded weight slider
• v0.4 — Geometry-aware selection (tight tunnel vs cavern vs ravine)
• v1.0 — Native NeoForge neoforge.mods.toml jar; 1.21.x target

Credits & License

All Rights Reserved. Sound design and programming by dylanjkl.