The Realtek ALC3251 is a High Definition Audio Codec with a 4-channel DAC, 4-channel ADC, stereo Class-D speaker amplifier (2W/channel), and headphone amp. It supports multiple streaming, SPDIF output, digital microphone inputs with AEC, BF, and NS, plus seven programmable EQ bands. Compliant with HD Audio Codec ECR-048A, it features ultra-low power design, Intel RTD3 support, and Universal Audio Jack compatibility. Designed for high efficiency, it delivers 97dB playback and 90dB recording quality for enhanced PC and mobile audio performance.