How to play sound via the PC speaker
Question: I have Windows 98 installed and a sound card but no speakers. How do I get sound to play through the PC speaker? –LegalH
Answer: The PC speaker won’t work with your sound card, but you can get it to at least play WAV files using the speak.exe driver from Microsoft.
You can download it from here.
Once it is installed, configure it by clicking Start, then Settings, then Control Panel, and then double-click Multimedia.
On the Advanced tab, double-click the Audio Devices branch, and then double-click Audio for Sound Driver for PC Speaker. Next click Settings.
For information on adjusting the settings, read the Speak.txt file that comes with the download.