Combat Flight Simulator: Slow Frame Rate During Game Play (198117)

SYMPTOMS

While you play Microsoft Combat Flight Simulator, the frame rate (the speed at which images are displayed on the screen, typically measured in frames per second) may be very slow.

CAUSE

This issue may occur if both of the following conditions are true:

A Yamaha sound card is installed in your computer.
You are using a sound driver that is incompatible with DirectX.

RESOLUTION

To resolve this issue, change your preferred audio playback device to the Game Compatible Device. To do this, follow these steps:

Click Start, point to Settings, and then click Control Panel.
Double-click Multimedia.
On the Audio tab, under Playback, click Game Compatible Device in the Preferred Device box.

If this device is not available, continue to the next step.
Click to select the Use Preferred Devices Only check box.

Note If you are using Microsoft Windows 98, click to select the Use Only Preferred Devices check box.
Click OK.
Close Control Panel, and then restart the computer.

For additional information about how to troubleshoot this issue, click the following article number to view the article in the Microsoft Knowledge Base:

812394 KB.EN-US How to Troubleshoot Sound-Related Issues

MORE INFORMATION

If this issue continues to occur, obtain and install the latest sound driver for the sound card installed in your computer. To do this, contact the manufacturer of your sound card.

For information about how to contact your sound card manufacturer, query in the Knowledge Base for one of the following articles:

65416 Hardware and Software Third-Party Vendor Contact List, A-K

60781 Hardware and Software Third-Party Vendor Contact List, L-P

60782 Hardware and Software Third-Party Vendor Contact List, Q-Z

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.