Yeah, AO sometimes keys on wrong instruments. Happens on srtalpha_MB_EVA_6 too, just before the music goes more lively. I've checked it agains DKDSF and DC - it doesn't happen there so the AICA ram image is good.
And by the way - where exactly did DSP program word field assignment came from? I've nothing on it (and yet I have my doubts on several things in aicadsp.c).