Reduce volume of BGM and possibly other "noisy" audio since voice audio can't be increased.

Overwrites parts of the setup code in fw::CSoundManager::setupCategory() to not call GetCategoryVolume but instead use values we control. Parts of the original code (calls to GetCategoryIndex) have to still happen!

We're quite limited with the amount of space we have available to us. There has to be a better way...

Mods/XenobladeX_mod_RebalanceAudio/patches.txt

@@ -0,0 +1,50 @@
+[XCXRebalanceAudioV101U]
+moduleMatches = 0xAB97DE6B
+
+_normalAudio = 0x028933EC
+_louderAudio = 0x028933F0
+_GetCategoryIndex = 0x030F201C
+_AfterEverythingIsDone = 0x28933F8
+
+0x02893350 = bl        _GetCategoryIndex
+0x02893354 = stw       r3, 0x1240(r29)
+0x02893358 = lwz       r3, 0x101A0004@l(r27)
+0x0289335C = bl        _GetCategoryIndex
+0x02893360 = stw       r3, 0x1248(r29)
+0x02893364 = lwz       r3, 0x101A0008@l(r27)
+0x02893368 = bl        _GetCategoryIndex
+0x0289336C = stw       r3, 0x1250(r29)
+0x02893370 = lwz       r3, 0x101A000C@l(r27)
+0x02893374 = bl        _GetCategoryIndex
+0x02893378 = stw       r3, 0x1258(r29)
+0x0289337C = lwz       r3, 0x101A0010@l(r27)
+0x02893380 = bl        _GetCategoryIndex
+0x02893384 = stw       r3, 0x1260(r29)
+0x02893388 = lwz       r3, 0x101A0014@l(r27)
+0x0289338C = bl        _GetCategoryIndex
+0x02893390 = stw       r3, 0x1268(r29)
+0x02893394 = lwz       r3, 0x101A0018@l(r27)
+0x02893398 = bl        _GetCategoryIndex
+0x0289339C = stw       r3, 0x1270(r29)
+0x028933A0 = lwz       r3, 0x101A001C@l(r27)
+0x028933A4 = bl        _GetCategoryIndex
+0x028933A8 = stw       r3, 0x1278(r29)
+0x028933AC = lis       r11, _normalAudio@ha
+0x028933B0 = lfs       f1, _normalAudio@l(r11)
+0x028933B4 = stfs      f1, 0x1244(r29) #BGM
+0x028933B8 = stfs      f1, 0x1254(r29) #BATTLE
+0x028933BC = stfs      f1, 0x125C(r29) #FIELD
+0x028933C0 = stfs      f1, 0x1264(r29) #GIMMICK
+0x028933C4 = stfs      f1, 0x126C(r29) #SYSTEM
+0x028933C8 = lis       r11, _louderAudio@ha
+0x028933CC = lfs       f1, _louderAudio@l(r11)
+0x028933D0 = stfs      f1, 0x1274(r29) #ENVIRONMENT
+0x028933D4 = stfs      f1, 0x127C(r29) #WEATHER
+0x028933D8 = stfs      f1, 0x124C(r29) #VOICE
+0x028933DC = li        r28, 3
+0x028933E0 = li        r30, 0x20
+0x028933E4 = addi      r31, r31, -8
+0x028933E8 = b         _AfterEverythingIsDone
+0x028933EC = .float    0.7
+0x028933F0 = .float    1.0
+0x028933F4 = nop

Mods/XenobladeX_mod_RebalanceAudio/rules.txt

@@ -0,0 +1,7 @@
+[Definition]
+titleIds = 0005000010116100,00050000101C4C00,00050000101C4D00
+name = Rebalance Audio
+path = "Xenoblade Chronicles X/Mods/RebalanceAudio"
+description = Edit presets for preference. Settings become active once past the title screen.
+version = 3
+