The Sound Blaster card came out in 1989 and broke sales records to become the most popular PC sound card of all time. The exact details of how it works haven't been understood until this recent reverse engineering effort. I will discuss the analysis methods used and the operating principles of the sound card -- both of the hardware and the firmware.
Eric Schlaepfer is a hardware engineer (forward and reverse). He's most known for designing a 6502 microprocessor out of discrete transistors, the MOnSter6502. He also designed the "Three Fives" discrete 555 timer kit as well as the XL741 discrete op-amp kit. Follow him on Twitter at @TubeTimeUS.