Bios | Qsound

By manipulating phase and amplitude, QSound could make audio effects appear to originate from outside the physical distance of the speakers.

The QSound hardware was different. It was essentially a specialized computer dedicated solely to audio. Here is why it was a game-changer: qsound bios

Before QSound became the standard, many arcade boards relied on FM synthesis (like the Yamaha YM2151) or simple PCM chips (like the OKI6295). These were great for "robotic" voices and synthetic instruments, but they lacked realism. By manipulating phase and amplitude, QSound could make