Yes, setting the DSP to LLE more accurately emulates the audio, so you'll encounter less problems with game sounds and music. Have you dumped the DSP files and set Dolphin to use the LLE recompiler? That's the usual way to get LLE audio to work with Dolphin.
If you've set up LLE audio like the instructions in the links described, post your Dolphin settings so we can see your configuration.
If you've set up LLE audio like the instructions in the links described, post your Dolphin settings so we can see your configuration.