Try running the game in HLE with a low framelimit (like 20FPS). If the audio stutters, then it's AX uCode. If the audio doesn't stutter, then it's another uCode (very likely to be Zelda uCode in that case)
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)