diff --git a/index.html b/index.html
index 8cae329e6..c01e6a85c 100644
--- a/index.html
+++ b/index.html
@@ -244,6 +244,11 @@
     <!-- 🧪 TEST SCENE -->
     <script src="src/scenes/SystemsTestScene.js"></script>
 
+    <!-- 🎵 NEW AUDIO SYSTEMS - JAN 8 2026 -->
+    <script src="src/systems/BiomeMusicSystem.js"></script> <!-- Background music cross-fade -->
+    <script src="src/systems/AudioTriggerSystem.js"></script> <!-- Spatial audio triggers -->
+    <script src="src/scenes/TestVisualAudioScene.js"></script> <!-- Visual & Audio Test Scene -->
+
     <script src="src/scenes/GameScene.js"></script>
 
     <script src="src/game.js"></script>
diff --git a/src/game.js b/src/game.js
index 42dbd4709..6a1ba3ce0 100644
--- a/src/game.js
+++ b/src/game.js
@@ -68,7 +68,7 @@ const config = {
             debug: false
         }
     },
-    scene: [BootScene, PreloadScene, SystemsTestScene, DemoScene, DemoSceneEnhanced, TiledTestScene, StoryScene, /* PrologueScene - DISABLED */, GameScene, UIScene, TownSquareScene],
+    scene: [BootScene, PreloadScene, SystemsTestScene, TestVisualAudioScene, DemoScene, DemoSceneEnhanced, TiledTestScene, StoryScene, /* PrologueScene - DISABLED */, GameScene, UIScene, TownSquareScene],
     scale: {
         mode: Phaser.Scale.FIT,
         autoCenter: Phaser.Scale.CENTER_BOTH
diff --git a/src/scenes/TestVisualAudioScene.js b/src/scenes/TestVisualAudioScene.js
new file mode 100644
index 000000000..f7a2624b0
--- /dev/null
+++ b/src/scenes/TestVisualAudioScene.js
@@ -0,0 +1,321 @@
+/**
+ * TestVisualAudioScene.js
+ * Demo scene: Kai speaks, dreadlocks wave, leaves fall
+ */
+
+class TestVisualAudioScene extends Phaser.Scene {
+    constructor() {
+        super({ key: 'TestVisualAudioScene' });
+    }
+
+    preload() {
+        console.log('🎬 Loading Test Visual & Audio Scene...');
+
+        // Load Kai voice
+        this.load.audio('kai_test_voice', 'assets/audio/voices/kai/kai_test_01.mp3');
+
+        // Load music (if exists)
+        if (this.cache.audio.exists('music/forest_ambient')) {
+            console.log('✅ Music ready');
+        }
+
+        // Load Kai sprite (placeholder for now)
+        // this.load.image('kai_idle', 'assets/references/main_characters/kai/animations/idle/kai_idle_frame1.png');
+    }
+
+    create() {
+        console.log('🎨 Creating Test Scene...');
+
+        const width = this.cameras.main.width;
+        const height = this.cameras.main.height;
+
+        // Background
+        this.cameras.main.setBackgroundColor('#7cfc00'); // Grassland green
+
+        // Title
+        const title = this.add.text(width / 2, 50, '🎨 VISUAL & AUDIO TEST', {
+            fontSize: '32px',
+            fontFamily: 'Arial',
+            color: '#ffffff',
+            stroke: '#000000',
+            strokeThickness: 4
+        });
+        title.setOrigin(0.5);
+        title.setDepth(1000);
+
+        // Instructions
+        const instructions = this.add.text(width / 2, 100,
+            'Use WASD to move Kai\nStep on YELLOW TILE to trigger voice\nWatch dreadlocks wave in wind\nWatch leaves fall', {
+            fontSize: '16px',
+            fontFamily: 'Arial',
+            color: '#ffffff',
+            stroke: '#000000',
+            strokeThickness: 3,
+            align: 'center'
+        });
+        instructions.setOrigin(0.5);
+        instructions.setDepth(1000);
+
+        // Create ground tiles
+        this.createGround();
+
+        // Create Kai (simple placeholder)
+        this.createKai();
+
+        // Initialize systems
+        this.initSystems();
+
+        // Create falling leaves
+        this.createFallingLeaves();
+
+        // Create wind effect on Kai's dreadlocks
+        this.createWindEffect();
+
+        // Camera follow
+        this.cameras.main.startFollow(this.kai, true, 0.1, 0.1);
+        this.cameras.main.setZoom(1.2);
+
+        // Controls
+        this.cursors = this.input.keyboard.createCursorKeys();
+        this.wasd = {
+            up: this.input.keyboard.addKey('W'),
+            down: this.input.keyboard.addKey('S'),
+            left: this.input.keyboard.addKey('A'),
+            right: this.input.keyboard.addKey('D')
+        };
+
+        console.log('✅ Test Scene Ready!');
+    }
+
+    createGround() {
+        // Simple grass tiles
+        const tileSize = 48;
+        const gridWidth = 20;
+        const gridHeight = 15;
+
+        for (let y = 0; y < gridHeight; y++) {
+            for (let x = 0; x < gridWidth; x++) {
+                const worldX = x * tileSize;
+                const worldY = y * tileSize;
+
+                // Grass tile (light/dark alternating)
+                const isLight = (x + y) % 2 === 0;
+                const color = isLight ? 0x7cfc00 : 0x6ab04c;
+
+                const tile = this.add.rectangle(worldX, worldY, tileSize, tileSize, color);
+                tile.setOrigin(0);
+                tile.setAlpha(0.5);
+            }
+        }
+
+        // Audio trigger tile (YELLOW)
+        const triggerX = 10;
+        const triggerY = 7;
+        const triggerTile = this.add.rectangle(triggerX * tileSize, triggerY * tileSize, tileSize, tileSize, 0xffff00);
+        triggerTile.setOrigin(0);
+        triggerTile.setAlpha(0.7);
+
+        // Label
+        const label = this.add.text(triggerX * tileSize + 24, triggerY * tileSize + 24, '🎙️', {
+            fontSize: '28px'
+        });
+        label.setOrigin(0.5);
+    }
+
+    createKai() {
+        // Simplified Kai representation
+        const kaiX = 240;
+        const kaiY = 240;
+
+        // Body
+        this.kai = this.add.circle(kaiX, kaiY, 20, 0xffc0cb); // Pink body
+        this.kai.setDepth(10);
+
+        // Add physics
+        this.physics.world.enable(this.kai);
+        this.kai.body.setCollideWorldBounds(true);
+        this.kai.speed = 150;
+
+        // Dreadlocks (will animate)
+        this.dreadlocks = [];
+        const dreadCount = 8;
+        const radius = 25;
+
+        for (let i = 0; i < dreadCount; i++) {
+            const angle = (i / dreadCount) * Math.PI * 2;
+            const x = kaiX + Math.cos(angle) * radius;
+            const y = kaiY + Math.sin(angle) * radius;
+
+            const dread = this.add.rectangle(x, y, 4, 30, 0xff1493); // Hot pink
+            dread.setOrigin(0.5, 0); // Pivot at top
+            dread.angle = (angle * 180 / Math.PI) + 90;
+            dread.setDepth(9);
+            dread.baseAngle = dread.angle;
+            dread.swayOffset = i * 0.5; // Stagger animation
+
+            this.dreadlocks.push(dread);
+        }
+
+        // Name label
+        this.kaiLabel = this.add.text(kaiX, kaiY - 40, 'KAI', {
+            fontSize: '14px',
+            fontFamily: 'Arial',
+            color: '#ffffff',
+            stroke: '#000000',
+            strokeThickness: 3
+        });
+        this.kaiLabel.setOrigin(0.5);
+        this.kaiLabel.setDepth(11);
+    }
+
+    initSystems() {
+        // Audio Trigger System
+        this.audioTriggers = new AudioTriggerSystem(this);
+
+        // Add trigger at yellow tile (10, 7)
+        this.audioTriggers.addTrigger(10, 7, 'kai_test_voice', {
+            radius: 0, // Exact tile only
+            volume: 1.0,
+            oneTime: true,
+            visualDebug: true,
+            callback: () => {
+                console.log('✅ Kai spoke her line!');
+                this.showSpeechBubble();
+            }
+        });
+
+        // Biome Music System (if music exists)
+        // this.biomeMusicSystem = new BiomeMusicSystem(this);
+        // this.biomeMusicSystem.playBiomeMusic('grassland');
+    }
+
+    showSpeechBubble() {
+        // Show speech bubble above Kai
+        const bubble = this.add.text(this.kai.x, this.kai.y - 60,
+            '"My name is Kai..."', {
+            fontSize: '12px',
+            fontFamily: 'Arial',
+            color: '#000000',
+            backgroundColor: '#ffffff',
+            padding: { x: 8, y: 4 }
+        });
+        bubble.setOrigin(0.5);
+        bubble.setDepth(100);
+
+        // Fade out after 3 seconds
+        this.tweens.add({
+            targets: bubble,
+            alpha: 0,
+            duration: 1000,
+            delay: 2000,
+            onComplete: () => bubble.destroy()
+        });
+    }
+
+    createFallingLeaves() {
+        // Particle emitter for falling leaves
+        this.leaves = [];
+
+        // Create 20 leaves
+        for (let i = 0; i < 20; i++) {
+            this.time.delayedCall(i * 300, () => {
+                this.spawnLeaf();
+            });
+        }
+    }
+
+    spawnLeaf() {
+        const x = Phaser.Math.Between(0, this.cameras.main.width);
+        const y = -20;
+
+        const leaf = this.add.ellipse(x, y, 8, 12, 0x90ee90);
+        leaf.setDepth(5);
+        leaf.setAlpha(0.7);
+
+        // Fall animation
+        this.tweens.add({
+            targets: leaf,
+            y: this.cameras.main.height + 50,
+            duration: Phaser.Math.Between(4000, 7000),
+            ease: 'Sine.InOut',
+            onComplete: () => {
+                leaf.destroy();
+                // Spawn new leaf
+                this.spawnLeaf();
+            }
+        });
+
+        // Sway side-to-side
+        this.tweens.add({
+            targets: leaf,
+            x: x + Phaser.Math.Between(-50, 50),
+            duration: 2000,
+            yoyo: true,
+            repeat: -1,
+            ease: 'Sine.InOut'
+        });
+
+        // Rotate
+        this.tweens.add({
+            targets: leaf,
+            angle: 360,
+            duration: 3000,
+            repeat: -1,
+            ease: 'Linear'
+        });
+    }
+
+    createWindEffect() {
+        // Dreadlocks sway in wind
+        this.time.addEvent({
+            delay: 50,
+            loop: true,
+            callback: () => {
+                const time = this.time.now / 1000;
+
+                this.dreadlocks.forEach((dread, i) => {
+                    const sway = Math.sin(time * 2 + dread.swayOffset) * 15;
+                    dread.angle = dread.baseAngle + sway;
+                });
+            }
+        });
+    }
+
+    update() {
+        if (!this.kai) return;
+
+        // Movement
+        this.kai.body.setVelocity(0);
+
+        if (this.cursors.left.isDown || this.wasd.left.isDown) {
+            this.kai.body.setVelocityX(-this.kai.speed);
+        } else if (this.cursors.right.isDown || this.wasd.right.isDown) {
+            this.kai.body.setVelocityX(this.kai.speed);
+        }
+
+        if (this.cursors.up.isDown || this.wasd.up.isDown) {
+            this.kai.body.setVelocityY(-this.kai.speed);
+        } else if (this.cursors.down.isDown || this.wasd.down.isDown) {
+            this.kai.body.setVelocityY(this.kai.speed);
+        }
+
+        // Update dreadlocks position
+        this.dreadlocks.forEach((dread, i) => {
+            const angle = (i / this.dreadlocks.length) * Math.PI * 2;
+            const radius = 25;
+            dread.x = this.kai.x + Math.cos(angle) * radius;
+            dread.y = this.kai.y + Math.sin(angle) * radius;
+        });
+
+        // Update label position
+        this.kaiLabel.setPosition(this.kai.x, this.kai.y - 40);
+
+        // Update audio triggers
+        this.audioTriggers.update(this.kai.x, this.kai.y);
+
+        // ESC to return to menu
+        if (this.input.keyboard.addKey('ESC').isDown) {
+            this.scene.start('GameScene');
+        }
+    }
+}
diff --git a/src/systems/AudioTriggerSystem.js b/src/systems/AudioTriggerSystem.js
new file mode 100644
index 000000000..6f8252611
--- /dev/null
+++ b/src/systems/AudioTriggerSystem.js
@@ -0,0 +1,181 @@
+/**
+ * AudioTriggerSystem.js
+ * Spatial audio triggers - play sound once when player enters area
+ */
+
+class AudioTriggerSystem {
+    constructor(scene) {
+        this.scene = scene;
+
+        // Active triggers
+        this.triggers = new Map();
+
+        // Triggered history (to prevent re-triggering)
+        this.triggered = new Set();
+
+        console.log('🔊 AudioTriggerSystem initialized');
+    }
+
+    /**
+     * Add a spatial audio trigger
+     * @param {number} x - Grid X position
+     * @param {number} y - Grid Y position
+     * @param {string} audioKey - Audio file key
+     * @param {object} options - Additional options
+     */
+    addTrigger(x, y, audioKey, options = {}) {
+        const triggerId = `${x},${y}`;
+
+        const trigger = {
+            x,
+            y,
+            audioKey,
+            radius: options.radius || 0, // 0 = exact tile only
+            volume: options.volume || 1.0,
+            oneTime: options.oneTime !== false, // Default true
+            delay: options.delay || 0, // Delay before playing (ms)
+            callback: options.callback || null, // Optional callback after playing
+            visualDebug: options.visualDebug || false
+        };
+
+        this.triggers.set(triggerId, trigger);
+
+        // Add visual debug marker if enabled
+        if (trigger.visualDebug && this.scene.add) {
+            const worldX = x * 48 + 24;
+            const worldY = y * 48 + 24;
+
+            const circle = this.scene.add.circle(worldX, worldY, 20, 0x00ff00, 0.3);
+            circle.setDepth(1000);
+
+            const text = this.scene.add.text(worldX, worldY - 30, '🔊', {
+                fontSize: '20px',
+                color: '#00ff00'
+            });
+            text.setOrigin(0.5);
+            text.setDepth(1001);
+        }
+
+        console.log(`✅ Audio trigger added at (${x}, ${y}): ${audioKey}`);
+
+        return triggerId;
+    }
+
+    /**
+     * Remove a trigger
+     */
+    removeTrigger(triggerId) {
+        this.triggers.delete(triggerId);
+        this.triggered.delete(triggerId);
+    }
+
+    /**
+     * Reset trigger (allow re-triggering)
+     */
+    resetTrigger(triggerId) {
+        this.triggered.delete(triggerId);
+    }
+
+    /**
+     * Reset all triggers
+     */
+    resetAll() {
+        this.triggered.clear();
+    }
+
+    /**
+     * Check if player is in trigger zone
+     */
+    checkTrigger(playerX, playerY) {
+        const playerGridX = Math.floor(playerX / 48);
+        const playerGridY = Math.floor(playerY / 48);
+
+        this.triggers.forEach((trigger, triggerId) => {
+            // Skip if already triggered and it's one-time only
+            if (trigger.oneTime && this.triggered.has(triggerId)) {
+                return;
+            }
+
+            // Check distance
+            const dx = Math.abs(playerGridX - trigger.x);
+            const dy = Math.abs(playerGridY - trigger.y);
+            const distance = Math.sqrt(dx * dx + dy * dy);
+
+            if (distance <= trigger.radius) {
+                // TRIGGER!
+                this.activateTrigger(trigger, triggerId);
+            }
+        });
+    }
+
+    /**
+     * Activate a trigger (play audio)
+     */
+    activateTrigger(trigger, triggerId) {
+        console.log(`🔊 TRIGGER ACTIVATED: ${triggerId} (${trigger.audioKey})`);
+
+        // Mark as triggered
+        this.triggered.add(triggerId);
+
+        // Play audio after delay
+        if (trigger.delay > 0) {
+            this.scene.time.delayedCall(trigger.delay, () => {
+                this.playAudio(trigger);
+            });
+        } else {
+            this.playAudio(trigger);
+        }
+    }
+
+    /**
+     * Play audio for trigger
+     */
+    playAudio(trigger) {
+        // Check if audio exists
+        if (!this.scene.cache.audio.exists(trigger.audioKey)) {
+            console.warn(`⚠️  Audio not found: ${trigger.audioKey}`);
+            return;
+        }
+
+        // Play sound
+        const sound = this.scene.sound.add(trigger.audioKey, {
+            volume: trigger.volume
+        });
+
+        sound.play();
+
+        // Visual feedback (optional)
+        if (trigger.visualDebug) {
+            const worldX = trigger.x * 48 + 24;
+            const worldY = trigger.y * 48 + 24;
+
+            const flash = this.scene.add.circle(worldX, worldY, 30, 0xffff00, 0.8);
+            flash.setDepth(1002);
+
+            this.scene.tweens.add({
+                targets: flash,
+                alpha: 0,
+                scale: 2,
+                duration: 500,
+                ease: 'Quad.Out',
+                onComplete: () => flash.destroy()
+            });
+        }
+
+        // Callback
+        if (trigger.callback) {
+            trigger.callback();
+        }
+
+        console.log(`✅ Audio played: ${trigger.audioKey}`);
+    }
+
+    /**
+     * Update - called every frame
+     */
+    update(playerX, playerY) {
+        if (this.triggers.size === 0) return;
+
+        this.checkTrigger(playerX, playerY);
+    }
+}
diff --git a/src/systems/BiomeMusicSystem.js b/src/systems/BiomeMusicSystem.js
new file mode 100644
index 000000000..dacbe0695
--- /dev/null
+++ b/src/systems/BiomeMusicSystem.js
@@ -0,0 +1,171 @@
+/**
+ * BiomeMusicSystem.js
+ * Cross-fade background music based on biome transitions
+ */
+
+class BiomeMusicSystem {
+    constructor(scene) {
+        this.scene = scene;
+
+        // Music tracks by biome
+        this.biomeTracks = {
+            'grassland': 'music/farm_ambient',
+            'forest': 'music/forest_ambient',
+            'town': 'music/town_theme',
+            'combat': 'music/combat_theme',
+            'night': 'music/night_theme'
+        };
+
+        // Current playing track
+        this.currentTrack = null;
+        this.currentBiome = null;
+
+        // Cross-fade settings
+        this.fadeDuration = 2000; // 2 seconds
+        this.volume = 0.5; // Master volume
+
+        console.log('🎵 BiomeMusicSystem initialized');
+    }
+
+    /**
+     * Preload all music tracks
+     */
+    preload() {
+        Object.entries(this.biomeTracks).forEach(([biome, track]) => {
+            if (this.scene.cache.audio.exists(track)) {
+                console.log(`✅ Music ready: ${track}`);
+            } else {
+                console.warn(`⚠️  Music missing: ${track}`);
+            }
+        });
+    }
+
+    /**
+     * Start music for a biome
+     */
+    playBiomeMusic(biome) {
+        // Skip if already playing this biome's music
+        if (biome === this.currentBiome && this.currentTrack) {
+            return;
+        }
+
+        const trackKey = this.biomeTracks[biome];
+
+        if (!trackKey) {
+            console.warn(`⚠️  No music for biome: ${biome}`);
+            return;
+        }
+
+        // Check if track exists
+        if (!this.scene.cache.audio.exists(trackKey)) {
+            console.warn(`⚠️  Music not loaded: ${trackKey}`);
+            return;
+        }
+
+        console.log(`🎵 Transitioning to: ${biome} (${trackKey})`);
+
+        // Cross-fade to new track
+        this.crossFadeTo(trackKey, biome);
+    }
+
+    /**
+     * Cross-fade from current track to new track
+     */
+    crossFadeTo(newTrackKey, biome) {
+        const oldTrack = this.currentTrack;
+
+        // Create new track
+        const newTrack = this.scene.sound.add(newTrackKey, {
+            loop: true,
+            volume: 0 // Start silent
+        });
+
+        newTrack.play();
+
+        // Fade in new track
+        this.scene.tweens.add({
+            targets: newTrack,
+            volume: this.volume,
+            duration: this.fadeDuration,
+            ease: 'Linear'
+        });
+
+        // Fade out old track if it exists
+        if (oldTrack) {
+            this.scene.tweens.add({
+                targets: oldTrack,
+                volume: 0,
+                duration: this.fadeDuration,
+                ease: 'Linear',
+                onComplete: () => {
+                    oldTrack.stop();
+                    oldTrack.destroy();
+                }
+            });
+        }
+
+        // Update current track
+        this.currentTrack = newTrack;
+        this.currentBiome = biome;
+    }
+
+    /**
+     * Stop all music
+     */
+    stop() {
+        if (this.currentTrack) {
+            this.scene.tweens.add({
+                targets: this.currentTrack,
+                volume: 0,
+                duration: 1000,
+                ease: 'Linear',
+                onComplete: () => {
+                    this.currentTrack.stop();
+                    this.currentTrack.destroy();
+                    this.currentTrack = null;
+                    this.currentBiome = null;
+                }
+            });
+        }
+    }
+
+    /**
+     * Set master volume
+     */
+    setVolume(volume) {
+        this.volume = Phaser.Math.Clamp(volume, 0, 1);
+
+        if (this.currentTrack) {
+            this.currentTrack.setVolume(this.volume);
+        }
+    }
+
+    /**
+     * Update called every frame
+     * Checks player's current biome and switches music
+     */
+    update(playerX, playerY) {
+        // Get current biome from biomeSystem
+        if (!this.scene.biomeSystem) return;
+
+        const gridX = Math.floor(playerX / 48);
+        const gridY = Math.floor(playerY / 48);
+
+        const biome = this.scene.biomeSystem.getBiomeAt(gridX, gridY);
+
+        if (biome && biome !== this.currentBiome) {
+            this.playBiomeMusic(biome);
+        }
+
+        // Handle night music override
+        if (this.scene.timeSystem) {
+            const hour = this.scene.timeSystem.currentHour || 12;
+
+            if (hour >= 20 || hour < 6) { // Night time
+                if (this.currentBiome !== 'night') {
+                    this.playBiomeMusic('night');
+                }
+            }
+        }
+    }
+}