Simplify v2 - remove GBC/GBA/Clean presets

- Removed sound mode buttons from UI
- Simplified colorizer to just one clean GB sound
- Less complexity, cleaner interface

src-v2/audio/effects/GameBoyColorizer.ts

@@ -222,53 +222,18 @@ export class GameBoyColorizer {
   }
   
   /**
-   * Create a preset configuration.
+   * Create the default GB configuration.
+   * Simple, clean Game Boy sound.
    */
-  static createPreset(preset: 'dmg' | 'gbc' | 'gba' | 'clean'): Partial<ColorizerConfig> {
-    switch (preset) {
-      case 'dmg':
-        // Original Game Boy - warm but clean
-        return {
-          enabled: true,
-          lowpassFreq: 8000,
-          bitDepth: 8,           // Less harsh than 4-bit
-          sampleRateReduction: 1, // No SR reduction (causes artifacts)
-          saturation: 0.1,       // Minimal saturation to avoid clicks
-          highpassFreq: 30,      // Let bass through!
-        };
-        
-      case 'gbc':
-        // Game Boy Color - slightly cleaner
-        return {
-          enabled: true,
-          lowpassFreq: 10000,
-          bitDepth: 8,
-          sampleRateReduction: 1,
-          saturation: 0.08,     // Minimal saturation
-          highpassFreq: 25,
-        };
-        
-      case 'gba':
-        // Game Boy Advance - cleaner still
-        return {
-          enabled: true,
-          lowpassFreq: 14000,
-          bitDepth: 12,
-          sampleRateReduction: 1,
-          saturation: 0.1,
-          highpassFreq: 20,
-        };
-        
-      case 'clean':
-        // No processing
-        return {
-          enabled: false,
-          lowpassFreq: 20000,
-          bitDepth: 16,
-          sampleRateReduction: 1,
-          saturation: 0,
-          highpassFreq: 20,
-        };
-    }
+  static createPreset(_preset?: string): Partial<ColorizerConfig> {
+    // Just one clean GB sound - no complexity
+    return {
+      enabled: true,
+      lowpassFreq: 8000,       // Natural GB rolloff
+      bitDepth: 8,             // Clean enough to avoid harshness
+      sampleRateReduction: 1,  // No SR reduction (causes artifacts)
+      saturation: 0.05,        // Very subtle warmth
+      highpassFreq: 30,        // Let bass through
+    };
   }
 }

v2.html

@@ -450,13 +450,6 @@
         <button id="btn-drum">Drum</button>
       </div>
       
-      <div class="quick-test" style="margin-top: 0.5rem;">
-        <span style="font-size: 0.6rem; opacity: 0.7;">Sound mode:</span>
-        <button id="btn-dmg" class="active">DMG</button>
-        <button id="btn-gbc">GBC</button>
-        <button id="btn-gba">GBA</button>
-        <button id="btn-clean">Clean</button>
-      </div>
       
       <div class="quick-test" style="margin-top: 0.5rem;">
         <span style="font-size: 0.6rem; opacity: 0.7;">Arranger:</span>
@@ -677,29 +670,6 @@
       apu.getNoiseChannel('n1')?.playKick(100);
     });
     
-    // Colorizer preset buttons
-    const presetButtons = {
-      dmg: document.getElementById('btn-dmg'),
-      gbc: document.getElementById('btn-gbc'),
-      gba: document.getElementById('btn-gba'),
-      clean: document.getElementById('btn-clean'),
-    };
-    
-    function setColorizerPreset(preset) {
-      log(`Sound mode: ${preset.toUpperCase()}`);
-      player.getAPU().setColorizerPreset(preset);
-      
-      // Update button states
-      Object.entries(presetButtons).forEach(([key, btn]) => {
-        btn.classList.toggle('active', key === preset);
-      });
-    }
-    
-    presetButtons.dmg.addEventListener('click', () => setColorizerPreset('dmg'));
-    presetButtons.gbc.addEventListener('click', () => setColorizerPreset('gbc'));
-    presetButtons.gba.addEventListener('click', () => setColorizerPreset('gba'));
-    presetButtons.clean.addEventListener('click', () => setColorizerPreset('clean'));
-    
     // ===== ARRANGER TOGGLE =====
     
     const arrangerBtn = document.getElementById('btn-arranger');