The C64 sound chip SID (Sound Interface Device) is an absolute stroke of genius. And the guy behind it is Robert Yannes. Here is a quote for his motivation when he designed the chip in 1982: "I thought the sound chips on the market, including those in the Atari computers, were primitive and obviously had been designed by people who knew nothing about music." The rest is history. If you need convincing, just listen to this epic intro music for Arkanoid from Martin Galway. That tune is turning 40 soon and easily stands the test of time.