I see a lot of users looking for IBM audio drivers (and others). This is the driver and text info file for the ESS integrated sound card used on many IBM 300GL, 300PL, and Aptiva systems. The IBM site most helpful to me is www-306.ibm.com/pc/support/site.wss/document.do?lndocid=DRVR-MATRIX
You can find almost everything there.
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