Technical Support Note
 

Product(s) involve	:	Sound Blaster Pro
Software(s) involve	:	NA
Third party card(s)	:	NA

 

Subject

Noise heard from speakers (FM channel) when startup Windows.

Description

Loud noise is heard from the speakers when startup Windows and the noise 
continues until TEST-SBP.EXE is executed or a warm reboot is encountered.  
On the other hand, reducing the volume control at the FM channel of 
SBPMIXER will reduce the noise but it will still presence at the audio port.

Solution/Action

The reason is that user uses the FM driver for SBP2 instead of SBP.  As the 
SBP uses the OPL2 chips and SBP2 uses OPL3 chip, and each of the driver 
controls different OPL chips, it is therefore not right to use the FM driver for 
SBP2 to drive the SBP.  Doing so will result in the above mentioned noise 
produced from the speakers.  To identify whether user have used the incorrect/ 
correct drivers:

a.	Examine the following file in the SYSTEM directory of Windows, the file 
should correspond to their respective sound card:

	Driver			Card
	SBPFM.DRV		SBP
	SBP2FM.DRV	SBP2
	
b.	SBFMDRV.COM (For DOS) under the respective SBP subdirectory, 

c.	Ensure the SBPFM.DRV file is reflected in the SYSTEM.INI file:

	[drivers]
	MIDI=sbpfm.drv

Reinstallation of the driver is required if the users' settings do not tally with the 
above mentioned.
24 February, 1993
Issue No: TSN930205

 


930205FG.DOC
 
Technical Department, Creative Technology Ltd