The main menu of the operating system Windows XP by clicking "start" to implement the procedure of turning off hardware acceleration of sound and go to "Run" (Windows XP).
Enter the value dxdiag in the Open box and click OK to confirm the command.
Click on the "Sound" dialog box "DirectX features" and drag the slider in the "hardware sound acceleration Level" to 0.
Confirm application of the selected modifications with OK and quit the application (for Windows XP).
Open the main menu of the operating systems Windows XP to initiate the operation off hardware acceleration for sound in OS Windows Vista or Windows 7 and click "All programs" (for Windows Vista and Windows 7).
Expand "accessories" and launch the "Windows Explorer".
Navigate to drive:Windowssystem32 and locate the file with the name dsound.dll.
Create a copy of the found file and save it on any removable media.
Log on to Windows Vista or Windows 7 and bring up the main menu by clicking "start".
Click "Programs" and expand the "Standard".
Run the application "Windows Explorer" and navigate to the above path.
Replace the file dsound.dll previously stored copy and restart the computer to apply the selected modifications (for Windows Vista and Windows 7). This action will restore the hardware DirectSound, and use the standard method of turning on/off hardware acceleration of sound in the selected versions of the OS.
Change the settings of the sound when using Sound Blaster, go to "Sound" and open the context menu of the item "speakers" click the right mouse button. Select "Properties" and uncheck all fields dialog box. This action will remove the possible imposition software filters hardware.