PS3_AUDIO_AO_SPD_REGBASE
(PS3_AUDIO_AO_SPD_REGBASE(n) + 0x00)
(PS3_AUDIO_AO_SPD_REGBASE(n) + 0x04 + 0x04 * (x))
(PS3_AUDIO_AO_SPD_REGBASE(n) + 0x34 + 0x04 * (y))