I've never heard of a sound card manufacturer named "5epa" so I cannot help until you provide additional info... eg: computer/motherboard brand and model? Or by chance are you referring to an Epox ep-5epa motherboard?
Open Device Manager, find and double-click the "sound device", click the Details tab, select "hardware id" and give me the hardware id string that begins with "PCI\VEN", (1st./top line of text only).
Sound chips integrated on a motherboard are usually made by companies like Realtek, Cmedia, ADI SoundMAX, VIA, and IDT (formerly Sigmatel). We will need to know what the sound chipset number is along with the hardware id string.