Poor Sound Quality with Future Domain 850-Series Controllers

• Microsoft Windows 95

SYMPTOMS

When you are using a Future Domain TMC-850, TMC-850M, TMC-850MER, or TMC- 850MEX SCSI controller with the Future Domain TMC-850/M/MER/MEX SCSI Host Adapter driver included with Windows 95, you may experience poor sound quality in some multimedia programs. This problem is known to occur with the following multimedia programs, but the problem is not program- specific:

• George Shrinks
• Infopedia

CAUSE

This is a known problem that can occur with the Future Domain SCSI controllers listed above when the corresponding protected-mode drivers included with Windows 95 are used. The Future Domain 850-series SCSI controllers are 8-bit controllers that may experience performance problems with more intensive multimedia programs, even when the real-mode drivers included with the controller are used. However, this poor performance is more pronounced when the protected-mode drivers included with Windows 95 are used.

RESOLUTION

To work around this problem, use the real-mode drivers included with the Future Domain SCSI controller and your CD-ROM drive instead of the protected-mode drivers included with Windows 95. For information about how to do so, consult the documentation included with the devices, or contact the manufacturer. Note that when you are using a real-mode driver for the CD-ROM drive, you must also load the Mscdex.exe file located in the Windows\Command folder from the Autoexec.bat file.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Windows 95. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.