The motherboard had nothing but the case usually had a speaker just to make a "beep" sound. I had to play Wolfenstein with that shit because my dad didn't have a sound blaster until he also got a CD-ROM drive to play Doom since he could only find a copy on CD and not floppy disk.
And even now, a SoundBlaster32 is better than the in-built audio stuff motherboards do have. Though it's not worth getting one just for games.
If you want good sound, buy an external usb DAC. It will be away from all electro magnetic interference and will be way better than any consumer stuff.