I'm having the same problem, and I'm stunned that there's no widely known solution by now (one year after release!). Perhaps this is a issue related to specific soundcards -- I happen to have a professional audio E-mu 0404, though I've tried setting the default soundcard in my Dell Dimension 4600 ("SoundMax") as the playback device, and still no dice. Help!
[sWKotOR]
ReportDateTime=2/22/2006 10:56:32 PM
SysInfoVersion=v1.00.60
GameExists=1
GameVersion=v2.10.427
GameInstallLocation=C:\Program Files\LucasArts\SWKotOR2\
[OS]
Name=WinXP
Version=Windows XP v5.1 build 2600 Service Pack 2
Service Pack=Service Pack 2
Status=Pass
[swapFiles]
C:\pagefile.sys=384
[CPU]
CPUCount=1
CPUSpeed=2992
CPUFamily=15
CPUModel=3
CPUStepping=4
CPUVendor=Intel
CPUName= Intel® Pentium® 4 CPU 3.00GHz
Status=Pass
[Memory]
RAM=2048
Status=Pass
[Disk Free Space]
C: (NTFS), UNICODE=13.21GB
F: (NTFS), UNICODE=1.48GB
G: (NTFS), UNICODE=383MB
H: (NTFS), UNICODE=25.55GB
Status=Pass
[CD-ROMs]
DriveLetters=D:\,E:\
Drives=ATAPI DVD RW,BENQ DVD DD DW1620,BENQ DVD DD DW1620,BENQ DVD DD DW1620,BENQ DVD DD DW1620,HL-DT-ST DVD-ROM GDR8163B
[Video]
Video Card Name=RADEON 9600 SERIES
Video Memory=256
Desktop Resolution=1680x1050x32 @ 60Hz
DirectX=DirectX 9.0c (4.09.00.0904)
OpenGL Version=2.0.5646 WinXP Release
OpenGL Vendor=ATI Technologies Inc.
OpenGL Renderer=RADEON 9600 XT x86/SSE2
ATI Driver=6.14.10.6599
Vid Card Status=Pass
Vid Card Driver Status=Pass
GL Status=Pass
DX Status=Pass
[Audio]
Sound Card Name=E-MU E-DSP Audio Processor (WDM)
Status=Pass
;Game Options from swkotor2.ini
[Display Options]
FullScreen=1
Disable Movies=0
Disable Intro Movies=0
Sort Modules=1
Width=640
Height=480
BitsPerPixels=32
RefreshRate=60
[sound Options]
Music Volume=85
Voiceover Volume=85
Sound Effects Volume=85
Movie Volume=85
Number 3D Voices=16
Number 2D Voices=24
2D3D Bias=0.50
EAX=0
Sound Init=0
Disable Sound=1
Force Software=0
[Graphics Options]
Grass=1
Shadows=1
EnableHardwareMouse=1
FullScreen=1
AllowSoftShadows=1
RefreshRate=60
Width=1280
Height=1024
V-Sync=0
Texture Quality=2
Anti Aliasing=0
Emitters=1
Anisotropy=1
Frame Buffer=1
Soft Shadows=0
Brightness=57
[Game Options]
Enable Tooltips=1
Keyboard Camera Deceleration=2000.000000
Keyboard Camera Acceleration=500.000000
Keyboard Camera DPS=200.000000
TextureVariation=0
BodyVariation=0
AppearanceType=0
PCGender=0
GameCompleted=0
CurSithLord=0
Hide InGame GUI=0
Use Small Fonts=0
Hide Unequippable=0
Tutorial Popups=1
Subtitles=1
Mini Map=1
Floating Numbers=1
Status Summary=1
Enable Mouse Teleporting To Buttons=1
Mouse Sensitivity=44
Difficulty Level=1
Auto Level Up NPCs=0
Mouse Look=0
AutoSave=1
EnableScreenShot=0
Reverse Mouse Buttons=0
Reverse Ingame YAxis=0
Reverse Minigame YAxis=0
Combat Movement=1
TooltipDelay Sec=1
Disable Movies=0
[config]
firstrun=0