Framerate down and gargling sounds on Metroid Other M

[dark_blitz]

guys im having a framerate dippings everywhere in game, no matter how low the settings are i still keep getting lower FPS from 30 ~ 22, in an area where it is subtle and no enemies to a boss fight, this includes opening some doors whenever im in the save room it falls from 41 fps to 20 flat -_-
also the sound gargles alot on the cutscenes even when im on Dsound both 32Hz and 48Hz and on Xsound both 48Hz and 32Hz


my current specs:
AMD X2 245 Processor 2.9Ghz (can be overclocked to 3.0 but i don't have a cooler for that)
Gigabyte GT220 1gb 128 bit ddr 3 OC (not overclocked)
3GB Ram

Dolphin Emulator Specs:
Dolphin version 3.0 592 - dirty

General Settings:
•Enabled Dual Core Skipping
•Enabled Idle Skipping
•JIT Recompiler

Interface:
•Use Panic Handlers On

Audi:
[Xsound 48Hz/32Hz or Dsound 48Hz/32Hz] (either one makes the sound gargles during cutscenes and some parts of the area

Graphics:
[Direct3D9]
[Keep window on top/Hide mouse cursor]
-on 1x native resolution (receives only 2fps upgrade still gets lowered on cutscenes)
-scaled efb copy (even when off still the same)
•Ignored format changes
•EFB copies: textures
External Frame Buffer: Disabled

Hacks:
•Fast Mipmaps Checked
•Disable per-pixel depth checked
[Disable Fog] (if uncheck boosts FPS up to 41 ~ 44 fps but only happens on some occasions it still goes down on cutscenes and most parts)

None Enabled on advanced options!

the OpenGL settings proved to be the same, they give me a slight boost only on some parts... -_-

also the audio was set to Xaudio2 until i keep hearing the gargling like a wuss...