Audio capture and playback on the Uno Q — the QRB2210 exposes analog Mic2 (INP/INM/BIAS), Headphone L/R + REF, LineOut P/M, Earpiece P/R, and HS_DET (headset detect) through the JMISC header. All audio runs through Linux ALSA on the MPU side. Read this BEFORE writing any project that records audio, plays sound, does voice recognition, or makes the board talk.