How to modify the Background Effects on phone call in PocketPC

Requirement: Windows Mobile 5.0 Phone Edition
You can use the background effects function to simulate a desired background environment sound, like in a car or on a train.

Enable Background Effects Function:
Tap START > Settings > Personal Tab > Wise Talk > Background Effects Tab.
Check Enable Background Sound to enable the background effects function.
Press OK to save.
After you enable your background effects, a small icon will appear during a incoming call.
Tap Apply on the incoming call screen to apply the selected background effect.
Or
Tap Answer to only answer incoming calls without applying background effect. Notice: After you enable your background effects function, on your incoming call screen, a Sound Effect icon will appear as a reminder that the background effects function is on.

Disable Background Effects Function:
Tap START > Settings > Personal Tab > Wise Talk > Background Effects Tab.
Uncheck Enable Background Sound to disable the background effects function.
Press OK to save.

Select Background Effects:
Tap START > Settings > Personal Tab > Wise Talk > Background Effects Tab.
Check Enable Background Sound to enable background effects.
Tap on the Background Sound drop down menu and choose your desired background effect from the list.
Press OK to save.

Adjust Background Effect Volume:
Tap START > Settings > Personal Tab > Wise Talk > Background Effects Tab.
Check Enable Background Sound to enable background effects.
Tap on the Background volume bar to adjust background effect volume. (To increase background effect volume, drag the volume bar to the right. To decrease background effect volume, drag the volume bar to the left. )
Press OK to save.