fs9 sound effects for teamspeak

hi guys! does anyone have any ideas on how to increase the volume levels for the rear channels in flight sim insofar as engine sounds etc are concerned ?
I have only cockpit effects coming through loud and clear but no discernible engine sounds-all sliders are up to full and there is no apparent menu for increasing rear effects for engines etc.
I have tried all settings in nvidea nforce control panel to no avail. any ideas ?
cheers! ???
I have only cockpit effects coming through loud and clear but no discernible engine sounds-all sliders are up to full and there is no apparent menu for increasing rear effects for engines etc.
I have tried all settings in nvidea nforce control panel to no avail. any ideas ?
cheers! ???
