The 92HD91 is a low-power, high-fidelity 4-channel audio codec designed for notebooks and business desktops. It integrates a capless headphone amp, Class-D speaker amp, parametric EQ, and LDO voltage regulator. Supporting 24-bit resolution, stereo VoIP, and 2.1 audio crossover, it enables high-quality HD Audio. Features include combo jack support, speaker protection, dual SPDIF output, digital mic input, and Microsoft WLP compliance. With minimal PCB footprint and BOM cost, the 92HD91 delivers advanced audio in a compact, efficient single-chip solution.