boa

Does disabling TobEx manually fix the problem?
Rename TobEx.dll to something else and run the game.

I had delete the TobEx.dll and run the game,the sound is back,thanks very much!

WeiDU.log:

// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
~TOBEX/TOBEX.TP2~ #0 #100 // TobEx - Core: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #101 // Apply Concentration Check On Damage [WIP]: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #102 // Awaken On Damage: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #103 // Blindness As Spell Description: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #104 // Disable Stoneskin Grey Colour [C]: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #105 // No Spell Interruption On Zero Damage: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #106 // Use Caster Level On Mirror Image [C]: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #107 // Allow All Races to Dual Class: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #108 // Allow Equipping Armor in Combat: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #109 // Disable Experience Boost: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #110 // Disable Force Inventory Pause: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #111 // Disable Silence On Charm: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #112 // Level One Proficiency Restrictions: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #113 // Remain Hidden On Pickpocket Success [C]: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #114 // Rest Spawns Advance Time: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #115 // Dialogue Greeting Subtitles: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #116 // Enable Animation Attack Sounds: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #117 // Universal Four Inventory Weapon Slots: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #118 // Subtitles For Standard Soundsets: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #119 // Remove all race-class restrictions: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #120 // Drop Inventory on Disintegrate: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #121 // Drop Inventory on Frozen Death: Beta 0020
~TOBEX/TOBEX.TP2~ #0 #122 // Drop Inventory on Stone Death: Beta 0020
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #0 // BG2 Fixpack - Core Fixes: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #1000 // BG2 Fixpack - Game Text Update -> GTU Light (by Wisp): v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #2 // Super Happy Fun Lucky Modder Pack: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #3 // BETA Core Fixes (please check the readme!): v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #100 // Party Gets XP for Sending Keldorn to Reconcile With Maria: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #101 // Improved Spell Animations: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #102 // Cromwell's Forging Actually Takes a Day: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #103 // Mixed-Use Dagger Fixes: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #104 // Ghreyfain's Holy Symbol Fixes: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #106 // Giants Receive Penalties When Attacking Halflings, Dwarves, and Gnomes: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #107 // Remove Dual-Classing Restriction from Archers and Stalkers: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #108 // Remove Second Attribute Bonus for Evil Path in Wrath Hell Trial: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #109 // Corrected Summoned Demon Behavior: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #110 // Additional Script Fixes: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #111 // Bard Song Fixes: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #112 // Wizard Slayers Cause Miscast Magic on Ranged Attacks: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #113 // Additional Alignment Fixes: v9.01
~BG2FIXPACK/SETUP-BG2FIXPACK.TP2~ #0 #114 // Change Free Action to Protect Against Stun: v9.01
~SETUP-BGT.TP2~ #0 #0 // Baldur's Gate Trilogy - Core: 1.12 (12 Jun 2011)
~SETUP-BGTTWEAK.TP2~ #0 #1000 // Bags of the Sword Coast: 9 (31 Dec 09)
~SETUP-BGTTWEAK.TP2~ #0 #1900 // Restore BG2 XP bonus for traps, locks, and scrolls: 9 (31 Dec 09)
~SETUP-BGTTWEAK.TP2~ #0 #2100 // Exotic Weapons For Taerom: 9 (31 Dec 09)
~SETUP-BGTTWEAK.TP2~ #0 #2700 // Put Sword of Chaos +2 in Sarevok's inventory: 9 (31 Dec 09)
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #60 // Weapon Animation Tweaks: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #110 // Icon Improvements: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #120 // Change Avatar When Wearing Robes or Armor (Galactygon): v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1010 // More Interjections: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1020 // Alter HP Triggers for NPC Wounded Dialogues: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1040 // Improved Athkatlan City Guard: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1080 // Add Bags of Holding: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1090 // Exotic Item Pack: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1120 // Stores Sell Higher Stacks of Items: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1130 // Reputation Resets in BG2 (BGT Only): v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1160 // Multiple Strongholds (Baldurdash) -> No Restrictions (Baldurdash): v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1170 // Bonus Merchants (Baldurdash): v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1180 // Female Edwina: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #1220 // Allow Cromwell to Upgrade Watcher's Keep Items: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #2090 // Change Experience Point Cap -> Remove Experience Cap: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #2151 // Wear Multiple Protection Items -> No Restrictions: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #2200 // Multi-Class Grandmastery (Weimer): v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #2210 // True Grandmastery (Baldurdash): v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #2300 // Triple-Class HLA Tables: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3000 // Higher HP on Level Up -> Maximum: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3030 // Easy Spell Learning -> 100% Learn Spells: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3080 // Unlimited Ammo Stacking: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3090 // Unlimited Gem and Jewelry Stacking: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3100 // Unlimited Potion Stacking: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3110 // Unlimited Scroll Stacking: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3160 // Keep Drizzt's Loot, Disable Malchor Harpell: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #3183 // Romance Cheats: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #4010 // Improved Fate Spirit Summoning: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #4020 // ToB-Style NPCs: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #4031 // Consistent Stats: Edwin -> Use BG2 Values: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #4041 // Consistent Stats: Jaheira -> Use BG2 Values: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #4061 // Consistent Stats: Minsc -> Use BG2 Values: v9
~BG2_TWEAKS/SETUP-BG2_TWEAKS.TP2~ #0 #4071 // Consistent Stats: Viconia -> Use BG2 Values: v9
~WIDESCREEN/WIDESCREEN.TP2~ #0 #0 // Widescreen Mod -> for the original Infinity Engine (CHOOSE THIS!): Widescreen Mod v3.02

Also,environmental audio can't be choose,it's grey.