ZX Spectrum

A technical write-up details how the ZX Spectrum, a 1982 home computer with only a 1-bit beeper for sound, can be made to play full digital audio. The piece explains the programming tricks used to coax multi-voice sound from hardware never designed for it. Retro computing enthusiasts are sharing and discussing the techniques, which revive a niche of 1980s and 1990s demoscene ingenuity.