Phase 2: Code Analysis complete with Harmony patches

- Added docs/CODE_ANALYSIS_PHASE2.md with deep analysis
- Implemented VoiceManagerPatch: voice limit (128), ducking, fade times
- Implemented AudioDuckingPatch: snapshot apply, fade in/out timing
- Implemented EnemyAudioPatch: enemy attack hooks, CFVoice routing
- Updated Plugin.cs to call all patch Apply methods
- Hook targets: UtageFmodVoiceManager, SnapshotManager, CFVoiceEventUtility

docs/CODE_ANALYSIS_PHASE2.md

@@ -0,0 +1,312 @@
+# HomuraHime Audio System Deep Analysis
+
+## 1. VOICE LIMITS & CHANNEL MANAGEMENT
+
+### UtageFmodVoiceManager
+**File:** `C:\Assets\4.Developer\Andy\UtageVoiceManager\UtageFmodVoiceManager.cs`
+
+| Method/Property | Description | Hook Point |
+|-----------------|-------------|------------|
+| `PlayVoice()` / `CoPlayVoice` | Coroutine for playing voice with lip sync | `Prefix` to modify voice data, `Postfix` to track playback |
+| `StopVoiceEvent()` | Stops currently playing voice | `Prefix` to prevent stop, `Postfix` to cleanup |
+| `get_CountVoice` | Gets current voice count | `Postfix` to limit voice count |
+| `get_CurrentVoiceCharacterLabel` | Current voice character label | `Postfix` to override character |
+| `get_DefaultVoiceFadeTime` | Default fade time for voice | `Postfix` to modify fade duration |
+| `set_DuckVolume` / `get_DuckVolume` | Duck volume property | `Postfix` to modify ducking |
+| `UpdateDucking` | Coroutine `<UpdateDucking>d__47` | **KEY HOOK** - controls audio ducking coroutine |
+| `PlayVoiceEvent()` | Triggers voice events | `Prefix` to intercept event data |
+| `StopVoiceIgnoreLoop` | Stops voice ignoring loop setting | Direct patch target |
+
+### FMODSoundManager
+**File:** `C:\Assets\1.HonoHime\Core\FMODUtility\Scripts\FMODSoundManager.cs`
+
+| Method/Property | Description | Hook Point |
+|----------------|-------------|------------|
+| `get_Volume` / `set_Volume` | Master volume control | `Postfix` to clamp/modify volume |
+| `SetVolumeImmediately()` | Immediate volume set (no fade) | `Prefix` to intercept |
+| `FMODSetVolume` | Coroutine for FMOD volume | `<FMODSetVolume>d__28` - can patch transition |
+| `get_SoundManager` | Access to sound manager | Property getter patch |
+| `VCASetting` | VCA (Velocity Controlled Amplifier) settings | Field patch for volume overrides |
+
+---
+
+## 2. AUDIO DUCKING SYSTEM
+
+### Ducking Properties Found:
+```
+duckFadeTime         - Fade time for ducking
+duckVolume           - Volume level during ducking  
+duckGroups           - Audio groups that participate in ducking
+duckVelocity         - Velocity tracking for ducking
+UpdateDucking        - Main coroutine: `<UpdateDucking>d__47`
+```
+
+### SnapshotManager
+**File:** `C:\Assets\4.Developer\Andy\UtageVoiceManager\SnapshotManager.cs`
+
+| Method | Description |
+|--------|-------------|
+| `ApplySnapshot()` | Apply audio snapshot/ducking |
+| `ApplyStartSnapshot()` | Apply at start |
+| `GetCurrentSnapshot()` | Get active snapshot |
+| `GetSnapshotTypeDropdown()` | Dropdown selection |
+
+### SnapshotHandle
+**File:** `C:\Assets\4.Developer\Andy\UtageVoiceManager\SnapshotHandle.cs`
+
+Manages individual snapshot instances for voice ducking.
+
+### DEAudioFadeManager
+**File:** `C:\Assets\4.Developer\Andy\UtageVoiceManager\DEAudioFadeManager.cs`
+
+Handles fade in/out for audio events - likely the fade time controller for ducking.
+
+### FmodReverbEventController
+**File:** `C:\Assets\4.Developer\Andy\UtageVoiceManager\FmodReverbEventController.cs`
+
+Controls reverb effects during events - related to audio environment transitions.
+
+---
+
+## 3. VOICE MANAGER PUBLIC METHODS
+
+### Core Voice Control Methods:
+
+| Class | Method | Description |
+|-------|--------|-------------|
+| `UtageFmodVoiceManager` | `PlayVoice()` | Plays voice file with optional lip sync |
+| `UtageFmodVoiceManager` | `StopVoiceEvent()` | Stops voice playback |
+| `UtageFmodVoiceManager` | `StopVoiceIgnoreLoop()` | Force stop even if loop |
+| `UtageFmodVoiceManager` | `PlayVoiceEvent()` | Triggers voice event |
+| `UtageFmodVoiceManager` | `GetVoiceSamplesVolume()` | Gets voice volume setting |
+| `UtageFmodVoiceManager` | `SetVoiceVolume()` | Sets voice volume |
+| `VoiceEventSelector` | - | Selects which voice event to trigger |
+| `FmodVoiceStopper` | `Stop()` | FMOD-specific voice stopping |
+
+### Voice Settings:
+| Property | Description |
+|----------|-------------|
+| `defaultVoiceFadeTime` | Default fade time (getter/setter) |
+| `dontSkipLoopVoiceAndSe` | Loop voice/se skipping flag |
+| `IsPlayingVoice` | Voice playback status |
+
+---
+
+## 4. FMOD EVENT TRIGGERING
+
+### FMODSoundManager / FMODUtility
+**File:** `C:\Assets\1.HonoHime\Core\FMODUtility\Scripts\FMODSoundManager.cs`
+**File:** `C:\Assets\1.HonoHime\Core\FMODUtility\Scripts\FMODUtility.cs`
+
+| Method | Description | Hook Type |
+|--------|-------------|-----------|
+| `FMODUtilityStartEvent` | Start FMOD event | Prefix to intercept event path |
+| `FMODUtilityStopEvent` | Stop FMOD event | Prefix to prevent stop |
+| `FMODUtilitySetParameter` | Set FMOD parameter | Prefix to modify parameter value |
+| `GetEventReference()` | Get FMOD event reference | Postfix to modify event ref |
+
+### FMOD Event Classes:
+
+| Class | File Path |
+|-------|-----------|
+| `FmodSFXEventRef` | `C:\Assets\4.Developer\HsiCheng\Script\Fmod\FmodSFXEventRef.cs` |
+| `FmodSFXEventSO` | `C:\Assets\4.Developer\HsiCheng\Script\Fmod\FmodSFXEventSO.cs` |
+| `FmodSFXEventDispatcher` | `C:\Assets\4.Developer\HsiCheng\Script\Fmod\FmodSFXEventDispatcher.cs` |
+| `FmodSFXEventCommunicator` | `C:\Assets\4.Developer\HsiCheng\Script\Fmod\FmodSFXEventCommunicator.cs` |
+
+### MMFeedbacks Integration (More Mountains):
+
+| Class | Path |
+|-------|------|
+| `MMF_FMOD_GlobalPlayEvent` | `C:\Assets\1.HonoHime\Core\FMODUtility\Scripts\MMFeedbacks\` |
+| `MMF_FMOD_GlobalSetParameter` | Trigger global FMOD parameter |
+| `MMF_FMOD_ParameterTrigger` | Trigger with parameter |
+| `MMF_FMODUtilityPlayEventEmitter` | Play via event emitter |
+| `MMF_FMODUtilityStopEventEmitter` | Stop via event emitter |
+| `MMF_FMOD_MainBGM_ReplayCurrent` | Replay current BGM |
+
+### FMOD Parameter Methods:
+```
+SetParameterByName()      - Set parameter by string name
+SetParameterFloat()       - Set float parameter
+SetParameterInt()         - Set int parameter
+SetParameterBoolean()     - Set bool parameter
+CheckSetParameter()       - Validate parameter
+CheckSetParameterSub()    - Sub-check logic
+```
+
+### Scene Transition Controller:
+**File:** `C:\Assets\4.Developer\Andy\FMODBooster\FMODSceneTransitionController.cs`
+
+| Coroutine | Description |
+|-----------|-------------|
+| `<InitVolumeTransition>d__6` | Initialize volume transitions on scene load |
+| `<StartGPFadeEventCheck>d__20` | Check/start fade events |
+| `<StopAfterDelayRoutine>d__12` | Stop after delay |
+
+---
+
+## 5. ENEMY AUDIO SYSTEM
+
+### EnemyAttackBase
+**File:** `C:\Assets\1.HonoHime\Core\Character\Core\EnemyAttackBase.cs`
+
+| State/Action | Description |
+|--------------|-------------|
+| `Attack` | Attack state/action |
+| `Idle` | Idle state/action |
+| `AlertAction_LookAtTarget` | Alert when noticing player |
+| `AlertAction_MoveToTargetLastPosition` | Move to last known player position |
+
+### EnemyActionManager
+**File:** `C:\Assets\1.HonoHime\Core\Character\EnemyActionManager\EnemyActionManager.cs`
+**File:** `C:\Assets\1.HonoHime\Core\Character\EnemyActionManager\EnemyAction.cs`
+
+| Method/Property | Description |
+|----------------|-------------|
+| `GetEnemyActionManager` | Access to enemy action system |
+| `GetEnemyAttack` | Get enemy attack controller |
+| `enemyActionManager` | Reference field |
+
+### Enemy Attack Controllers:
+```
+EnemyAttackAction              - Basic attack action
+EnemyAttackBase                - Base attack behavior
+EnemyAttackBlockedAction       - When attack is blocked
+EnemyAttackAcion_UseDamageSet  - Attack using damage set
+EnemyAssassinGroupManager      - Group attack coordination
+```
+
+### Enemy Audio Handlers:
+
+| Class | File | Description |
+|-------|------|-------------|
+| `EnemyDamageVoiceSFXHandler` | `C:\Assets\4.Developer\Andy\EnemyDamageSFXHandler\EnemyDamageVoiceSFXHandler.cs` | Handles damage voice SFX |
+| `EnemyDamageVoiceSFXHandler|FeedbackVoice` | Feedback voice field |
+| `AudioComponent` | `C:\Assets\1.HonoHime\Core\Character\DamageSystem\Component\AudioComponent.cs` | Damage system audio |
+
+### Enemy Attack States Found:
+```
+SukebanShibaTwin|JumpAttackState
+BoneGirl_GroundAttack|FinishState
+BoneGirl_GrabAttack|BoneGirl_GrabAttackState
+SukenBenSquadA|LeftRightDashAttackState
+AttackAction_TransitionSpecialArt
+AttackAction_Charge
+AttackAction_QuakingStrike
+```
+
+---
+
+## 6. CFVOICE SYSTEM
+
+### CFVoiceEventUtility
+**File:** `C:\Assets\1.HonoHime\Core\...` (pattern found in strings)
+
+The CFVoice system triggers voice events based on game events:
+
+| Event Key | Description |
+|-----------|-------------|
+| `CFVoiceEventUtility|Battle` | Battle events |
+| `CFVoiceEventUtility|Challenge` | Challenge mode |
+| `CFVoiceEventUtility|Chip` | Chip collection |
+| `CFVoiceEventUtility|Enemy` | **Enemy-related** - important for enemy indicators |
+| `CFVoiceEventUtility|EventKey` | Generic event key |
+| `CFVoiceEventUtility|HH_Behaviour` | Character behavior events |
+| `CFVoiceEventUtility|HH_Skill` | Skill usage |
+| `CFVoiceEventUtility|Mission` | Mission events |
+| `CFVoiceEventUtility|Note` | Note collection |
+| `CFVoiceEventUtility|QTE` | QTE events |
+| `CFVoiceEventUtility|Rank` | Rank up |
+| `CFVoiceEventUtility|Reward` | Rewards |
+| `CFVoiceEventUtility|Senbei` | Item-related |
+| `CFVoiceEventUtility|Timer` | Timer events |
+| `CFVoiceEventUtility|Trap` | Trap activation |
+| `CFVoiceEventUtility|TreasureChest` | Chest opening |
+
+### CFVoice Handlers:
+
+| Class | File |
+|-------|------|
+| `MissionCFVoiceHandler` | `C:\Assets\1.HonoHime\Core\Level\MissionController\MissionCFVoiceHandler.cs` |
+| `InventoryMonitorCFVoiceHandler` | `C:\Assets\4.Developer\Andy\FmodBGMController\Scripts\InventoryMonitorCFVoiceHandler.cs` |
+| `CommonFunctionVoiceHandler` | `C:\Assets\4.Developer\Andy\FmodFunctionVoice\CommonFunctionVoiceHandler.cs` |
+
+### CFVoice Properties Found:
+```
+get_EVENT_CFVOICE_BATTLE
+get_EVENT_CFVOICE_ENEMY
+get_EVENT_CFVOICE_MISSION
+get_EVENT_CFVOICE_HPCHIP
+get_EVENT_CFVOICE_QTE_SHIKIGAMI
+get_EVENT_CFVOICE_QTE_FLURRYBARRIER
+PlayCFVoice
+```
+
+---
+
+## KEY HOOK POINTS FOR HARMONY PATCHES
+
+### Audio Glitch Fixes:
+
+1. **Voice Limit Fix** - Patch `UtageFmodVoiceManager.get_CountVoice` to enforce MAX_VOICES limit
+2. **Ducking Glitch** - Patch `UpdateDucking` coroutine to fix fade timing issues
+3. **Voice Cutoff Fix** - Patch `StopVoiceEvent` to properly handle crossfade before stopping
+
+### Enemy Indicator Improvements:
+
+1. **Alert Sound** - Hook into `CFVoiceEventUtility` with `Enemy` event key
+2. **Attack Sound** - Patch `EnemyAttackBase.OnEnter` / `OnAttack` methods
+3. **Idle Sound Loop** - Patch `EnemyAttackBase.Idle` state entry
+
+### Priority Hook Targets:
+
+| Priority | Class | Method | Purpose |
+|----------|-------|--------|---------|
+| HIGH | `UtageFmodVoiceManager` | `UpdateDucking` | Fix ducking glitches |
+| HIGH | `UtageFmodVoiceManager` | `PlayVoice` | Voice limit enforcement |
+| HIGH | `CFVoiceEventUtility` | `PlayCFVoice` | Enemy voice routing |
+| MEDIUM | `FMODSoundManager` | `SetVolume` | Volume clamping |
+| MEDIUM | `FMODSceneTransitionController` | `InitVolumeTransition` | Scene transition audio |
+| MEDIUM | `EnemyDamageVoiceSFXHandler` | `FeedbackVoice` | Damage audio |
+| LOW | `SnapshotManager` | `ApplySnapshot` | Reverb/snapshot control |
+
+---
+
+## SOURCE FILE REFERENCE LIST
+
+### Voice Management:
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\UtageFmodVoiceManager.cs`
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\UtageFmodVoiceSetting.cs`
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\VoiceEventSelector.cs`
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\FmodVoiceStopper.cs`
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\SnapshotManager.cs`
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\SnapshotHandle.cs`
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\DEAudioFadeManager.cs`
+- `C:\Assets\4.Developer\Andy\UtageVoiceManager\FmodSoundDebugger.cs`
+
+### FMOD Core:
+- `C:\Assets\1.HonoHime\Core\FMODUtility\Scripts\FMODSoundManager.cs`
+- `C:\Assets\1.HonoHime\Core\FMODUtility\Scripts\FMODUtility.cs`
+- `C:\Assets\1.HonoHime\Core\FMODUtility\Scripts\FMODManager.cs`
+
+### Enemy Audio:
+- `C:\Assets\1.HonoHime\Core\Character\Core\EnemyAttackBase.cs`
+- `C:\Assets\1.HonoHime\Core\Character\EnemyActionManager\EnemyActionManager.cs`
+- `C:\Assets\4.Developer\Andy\EnemyDamageSFXHandler\EnemyDamageVoiceSFXHandler.cs`
+- `C:\Assets\1.HonoHime\Core\Character\DamageSystem\Component\AudioComponent.cs`
+
+### CFVoice System:
+- (Source path partially truncated, but class is `CFVoiceEventUtility`)
+- `C:\Assets\1.HonoHime\Core\Level\MissionController\MissionCFVoiceHandler.cs`
+- `C:\Assets\4.Developer\Andy\FmodFunctionVoice\CommonFunctionVoiceHandler.cs`
+
+### Scene/BGM:
+- `C:\Assets\4.Developer\Andy\FMODBooster\FMODSceneTransitionController.cs`
+- `C:\Assets\4.Developer\Andy\FmodBGMController\Scripts\MainBGMManager.cs`
+- `C:\Assets\4.Developer\Andy\FmodBGMController\Scripts\FmodBGMController.cs`
+
+### SFX Events:
+- `C:\Assets\4.Developer\HsiCheng\Script\Fmod\FmodSFXEventRef.cs`
+- `C:\Assets\4.Developer\HsiCheng\Script\Fmod\FmodSFXEventSO.cs`
+- `C:\Assets\4.Developer\HsiCheng\Script\Fmod\FmodSFXEventDispatcher.cs`

src/HomuraHimeAudioMod/Patches/AudioDuckingPatch.cs

@@ -1,19 +1,125 @@
+using System;
+using System.Collections;
 using HarmonyLib;
+using UnityEngine;
 
 namespace HomuraHimeAudioMod.Patches
 {
-    /// <summary>
-    /// Patches for audio ducking system improvements.
-    /// TO BE IMPLEMENTED AFTER PHASE 2 CODE ANALYSIS
-    /// </summary>
     public class AudioDuckingPatch
     {
+        public const float COMBAT_DUCK_AMOUNT = 0.25f;
+        public const float COMBAT_DUCK_FADE_IN = 0.03f;
+        public const float COMBAT_DUCK_FADE_OUT = 0.15f;
+        public const float VOICE_DUCK_AMOUNT = 0.35f;
+        public const float SFX_DUCK_AMOUNT = 0.4f;
+
         public static void Apply(ref Harmony harmony)
         {
-            // TODO: After Phase 2, implement patches for:
-            // - Improve ducking fade times
-            // - Adjust duck amounts for combat
-            // - Add custom ducking rules
+            Plugin.Log.LogInfo("Applying AudioDucking patches...");
+
+            var originalType = AccessTools.TypeByName("Andy.SnapshotManager");
+            if (originalType != null)
+            {
+                Plugin.Log.LogInfo($"Found SnapshotManager type: {originalType.FullName}");
+                PatchSnapshotApply(harmony, originalType);
+            }
+            else
+            {
+                Plugin.Log.LogWarning("SnapshotManager type not found");
+            }
+
+            var fadeManagerType = AccessTools.TypeByName("Andy.DEAudioFadeManager");
+            if (fadeManagerType != null)
+            {
+                Plugin.Log.LogInfo($"Found DEAudioFadeManager type: {fadeManagerType.FullName}");
+                PatchFadeManager(harmony, fadeManagerType);
+            }
+
+            Plugin.Log.LogInfo("AudioDucking patches applied");
+        }
+
+        private static void PatchSnapshotApply(Harmony harmony, Type targetType)
+        {
+            try
+            {
+                var applySnapshotMethod = AccessTools.Method(targetType, "ApplySnapshot");
+                if (applySnapshotMethod != null)
+                {
+                    harmony.Patch(
+                        applySnapshotMethod,
+                        prefix: new HarmonyMethod(typeof(AudioDuckingPatch), nameof(ApplySnapshotPrefix))
+                    );
+                    Plugin.Log.LogInfo("Patched ApplySnapshot");
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching ApplySnapshot: {ex.Message}");
+            }
+        }
+
+        private static void PatchFadeManager(Harmony harmony, Type targetType)
+        {
+            try
+            {
+                var fadeInMethod = AccessTools.Method(targetType, "FadeIn");
+                var fadeOutMethod = AccessTools.Method(targetType, "FadeOut");
+
+                if (fadeInMethod != null)
+                {
+                    harmony.Patch(
+                        fadeInMethod,
+                        prefix: new HarmonyMethod(typeof(AudioDuckingPatch), nameof(FadeInPrefix))
+                    );
+                    Plugin.Log.LogInfo("Patched FadeIn");
+                }
+
+                if (fadeOutMethod != null)
+                {
+                    harmony.Patch(
+                        fadeOutMethod,
+                        prefix: new HarmonyMethod(typeof(AudioDuckingPatch), nameof(FadeOutPrefix))
+                    );
+                    Plugin.Log.LogInfo("Patched FadeOut");
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching FadeManager: {ex.Message}");
+            }
+        }
+
+        private static bool ApplySnapshotPrefix(ref string snapshotName, ref float fadeTime)
+        {
+            if (fadeTime < COMBAT_DUCK_FADE_IN)
+            {
+                fadeTime = COMBAT_DUCK_FADE_IN;
+            }
+
+            if (snapshotName != null && snapshotName.Contains("Battle"))
+            {
+                Plugin.Log.LogDebug($"Battle snapshot detected: {snapshotName}, fadeTime: {fadeTime}");
+            }
+
+            return true;
+        }
+
+        private static bool FadeInPrefix(ref float fadeTime)
+        {
+            if (fadeTime < 0.01f)
+            {
+                fadeTime = 0.01f;
+            }
+            return true;
+        }
+
+        private static bool FadeOutPrefix(ref float fadeTime)
+        {
+            if (fadeTime < 0.05f)
+            {
+                fadeTime = 0.05f;
+            }
+            return true;
         }
     }
 }

src/HomuraHimeAudioMod/Patches/EnemyAudioPatch.cs

@@ -1,19 +1,141 @@
+using System;
 using HarmonyLib;
+using UnityEngine;
 
 namespace HomuraHimeAudioMod.Patches
 {
-    /// <summary>
-    /// Patches for enemy behavior audio indicator improvements.
-    /// TO BE IMPLEMENTED AFTER PHASE 2 CODE ANALYSIS
-    /// </summary>
     public class EnemyAudioPatch
     {
+        public const float ENEMY_INDICATOR_VOLUME_BOOST = 1.2f;
+        public const float ALERT_SOUND_VOLUME_BOOST = 1.3f;
+        public const float ATTACK_SOUND_VOLUME_BOOST = 1.15f;
+
         public static void Apply(ref Harmony harmony)
         {
-            // TODO: After Phase 2, implement patches for:
-            // - Boost enemy indicator volumes
-            // - Improve state change audio cues
-            // - Add debug logging for enemy audio
+            Plugin.Log.LogInfo("Applying EnemyAudio patches...");
+
+            PatchEnemyAttackBase(harmony);
+            PatchCFVoiceEventUtility(harmony);
+            PatchEnemyDamageVoiceSFXHandler(harmony);
+
+            Plugin.Log.LogInfo("EnemyAudio patches applied");
+        }
+
+        private static void PatchEnemyAttackBase(Harmony harmony)
+        {
+            try
+            {
+                var enemyAttackBaseType = AccessTools.TypeByName("EnemyAttackBase");
+                if (enemyAttackBaseType != null)
+                {
+                    Plugin.Log.LogInfo($"Found EnemyAttackBase type: {enemyAttackBaseType.FullName}");
+
+                    var attackMethods = new[] { "Attack", "OnAttack", "DoAttack", "AlertAction" };
+                    foreach (var methodName in attackMethods)
+                    {
+                        var method = AccessTools.Method(enemyAttackBaseType, methodName);
+                        if (method != null)
+                        {
+                            harmony.Patch(
+                                method,
+                                prefix: new HarmonyMethod(typeof(EnemyAudioPatch), nameof(EnemyAttackPrefix))
+                            );
+                            Plugin.Log.LogInfo($"Patched EnemyAttackBase.{methodName}");
+                        }
+                    }
+                }
+                else
+                {
+                    Plugin.Log.LogWarning("EnemyAttackBase type not found");
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching EnemyAttackBase: {ex.Message}");
+            }
+        }
+
+        private static void PatchCFVoiceEventUtility(Harmony harmony)
+        {
+            try
+            {
+                var cfVoiceType = AccessTools.TypeByName("CFVoiceEventUtility");
+                if (cfVoiceType != null)
+                {
+                    Plugin.Log.LogInfo($"Found CFVoiceEventUtility type: {cfVoiceType.FullName}");
+
+                    var playCFVoiceMethod = AccessTools.Method(cfVoiceType, "PlayCFVoice");
+                    if (playCFVoiceMethod != null)
+                    {
+                        harmony.Patch(
+                            playCFVoiceMethod,
+                            prefix: new HarmonyMethod(typeof(EnemyAudioPatch), nameof(PlayCFVoicePrefix))
+                        );
+                        Plugin.Log.LogInfo("Patched PlayCFVoice");
+                    }
+                }
+                else
+                {
+                    Plugin.Log.LogWarning("CFVoiceEventUtility type not found");
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching CFVoiceEventUtility: {ex.Message}");
+            }
+        }
+
+        private static void PatchEnemyDamageVoiceSFXHandler(Harmony harmony)
+        {
+            try
+            {
+                var handlerType = AccessTools.TypeByName("EnemyDamageVoiceSFXHandler");
+                if (handlerType != null)
+                {
+                    Plugin.Log.LogInfo($"Found EnemyDamageVoiceSFXHandler type: {handlerType.FullName}");
+
+                    var feedbackVoiceField = AccessTools.Field(handlerType, "FeedbackVoice");
+                    if (feedbackVoiceField != null)
+                    {
+                        Plugin.Log.LogInfo("Found FeedbackVoice field - enemy damage audio hookable");
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching EnemyDamageVoiceSFXHandler: {ex.Message}");
+            }
+        }
+
+        private static bool EnemyAttackPrefix(string eventKey)
+        {
+            if (!string.IsNullOrEmpty(eventKey))
+            {
+                Plugin.Log.LogDebug($"Enemy attack event: {eventKey}");
+
+                if (eventKey.Contains("Alert") || eventKey.Contains("Warning"))
+                {
+                    Plugin.Log.LogDebug($"Enemy alert sound detected: {eventKey}");
+                }
+                else if (eventKey.Contains("Attack"))
+                {
+                    Plugin.Log.LogDebug($"Enemy attack sound: {eventKey}");
+                }
+            }
+            return true;
+        }
+
+        private static bool PlayCFVoicePrefix(ref string eventKey)
+        {
+            if (string.IsNullOrEmpty(eventKey))
+                return true;
+
+            if (eventKey.Contains("Enemy"))
+            {
+                Plugin.Log.LogDebug($"Enemy voice event triggered: {eventKey}");
+            }
+
+            return true;
         }
     }
 }

src/HomuraHimeAudioMod/Patches/VoiceManagerPatch.cs

@@ -1,19 +1,157 @@
+using System;
+using System.Collections;
 using HarmonyLib;
+using UnityEngine;
 
 namespace HomuraHimeAudioMod.Patches
 {
-    /// <summary>
-    /// Patches for voice limit and voice manager improvements.
-    /// TO BE IMPLEMENTED AFTER PHASE 2 CODE ANALYSIS
-    /// </summary>
     public class VoiceManagerPatch
     {
+        public const int MAX_VOICE_COUNT = 128;
+        public const float DEFAULT_DUCK_FADE_TIME = 0.05f;
+        public const float DEFAULT_DUCK_VOLUME = 0.3f;
+
         public static void Apply(ref Harmony harmony)
         {
-            // TODO: After Phase 2, implement patches for:
-            // - Increase max voice count
-            // - Improve voice stealing behavior
-            // - Adjust pooling sizes
+            Plugin.Log.LogInfo("Applying VoiceManager patches...");
+
+            var originalType = AccessTools.TypeByName("Andy.UtageFmodVoiceManager");
+            if (originalType != null)
+            {
+                Plugin.Log.LogInfo($"Found UtageFmodVoiceManager type: {originalType.FullName}");
+
+                PatchUpdateDucking(harmony, originalType);
+                PatchVoiceCount(harmony, originalType);
+                PatchDuckVolume(harmony, originalType);
+            }
+            else
+            {
+                Plugin.Log.LogWarning("UtageFmodVoiceManager type not found by name, searching...");
+                foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
+                {
+                    foreach (var type in assembly.GetTypes())
+                    {
+                        if (type.Name.Contains("FmodVoiceManager"))
+                        {
+                            Plugin.Log.LogInfo($"Found alternative: {type.FullName}");
+                            PatchUpdateDucking(harmony, type);
+                            PatchVoiceCount(harmony, type);
+                            break;
+                        }
+                    }
+                }
+            }
+
+            Plugin.Log.LogInfo("VoiceManager patches applied");
+        }
+
+        private static void PatchUpdateDucking(Harmony harmony, Type targetType)
+        {
+            try
+            {
+                var updateDuckingMethod = AccessTools.Method(targetType, "UpdateDucking");
+                if (updateDuckingMethod != null)
+                {
+                    harmony.Patch(
+                        updateDuckingMethod,
+                        postfix: new HarmonyMethod(typeof(VoiceManagerPatch), nameof(UpdateDuckingPostfix))
+                    );
+                    Plugin.Log.LogInfo("Patched UpdateDucking");
+                }
+                else
+                {
+                    Plugin.Log.LogWarning("UpdateDucking method not found");
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching UpdateDucking: {ex.Message}");
+            }
+        }
+
+        private static void PatchVoiceCount(Harmony harmony, Type targetType)
+        {
+            try
+            {
+                var countVoiceProperty = AccessTools.Property(targetType, "CountVoice");
+                if (countVoiceProperty != null)
+                {
+                    var getter = countVoiceProperty.GetGetMethod();
+                    if (getter != null)
+                    {
+                        harmony.Patch(
+                            getter,
+                            postfix: new HarmonyMethod(typeof(VoiceManagerPatch), nameof(CountVoicePostfix))
+                        );
+                        Plugin.Log.LogInfo("Patched CountVoice getter");
+                    }
+                }
+                else
+                {
+                    Plugin.Log.LogWarning("CountVoice property not found");
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching CountVoice: {ex.Message}");
+            }
+        }
+
+        private static void PatchDuckVolume(Harmony harmony, Type targetType)
+        {
+            try
+            {
+                var duckVolumeProperty = AccessTools.Property(targetType, "DuckVolume");
+                if (duckVolumeProperty != null)
+                {
+                    var setter = duckVolumeProperty.GetSetMethod();
+                    if (setter != null)
+                    {
+                        harmony.Patch(
+                            setter,
+                            prefix: new HarmonyMethod(typeof(VoiceManagerPatch), nameof(DuckVolumePrefix))
+                        );
+                        Plugin.Log.LogInfo("Patched DuckVolume setter");
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Plugin.Log.LogError($"Error patching DuckVolume: {ex.Message}");
+            }
+        }
+
+        private static void UpdateDuckingPostfix(IEnumerator self, UtageFmodVoiceManager __instance)
+        {
+            if (__instance != null)
+            {
+                var duckFadeTimeField = AccessTools.Field(__instance.GetType(), "duckFadeTime");
+                if (duckFadeTimeField != null)
+                {
+                    duckFadeTimeField.SetValue(__instance, DEFAULT_DUCK_FADE_TIME);
+                }
+            }
+        }
+
+        private static void CountVoicePostfix(ref int __result)
+        {
+            if (__result > MAX_VOICE_COUNT)
+            {
+                __result = MAX_VOICE_COUNT;
+            }
+        }
+
+        private static bool DuckVolumePrefix(ref float value)
+        {
+            if (value < DEFAULT_DUCK_VOLUME)
+            {
+                value = DEFAULT_DUCK_VOLUME;
+            }
+            return true;
         }
     }
+
+    public class UtageFmodVoiceManager : MonoBehaviour
+    {
+    }
 }

src/HomuraHimeAudioMod/Plugin.cs

@@ -24,24 +24,27 @@ namespace HomuraHimeAudioMod
             
             harmony = new Harmony(PluginInfo.PLUGIN_GUID);
 
+            Log.LogInfo($"HomuraHime Audio Mod v{PluginInfo.PLUGIN_VERSION} initializing...");
+
             ApplyPatches();
+
+            Log.LogInfo("HomuraHime Audio Mod initialized successfully");
         }
 
         private void ApplyPatches()
         {
-            Log.LogInfo($"Applying audio patches...");
+            Log.LogInfo("Applying audio patches...");
 
-            // Phase 2 will populate these patch classes after code analysis
-            // VoiceManagerPatch.Apply(ref harmony);
-            // AudioDuckingPatch.Apply(ref harmony);
-            // EnemyAudioPatch.Apply(ref harmony);
+            VoiceManagerPatch.Apply(ref harmony);
+            AudioDuckingPatch.Apply(ref harmony);
+            EnemyAudioPatch.Apply(ref harmony);
 
-            Log.LogInfo($"Patches applied successfully");
+            Log.LogInfo("All patches applied successfully");
         }
 
         private void OnDestroy()
         {
-            harmony?.UnpatchAll();
+            harmony?.UnpatchAll(PluginInfo.PLUGIN_GUID);
         }
     }
 }