It's still not working
I tried all your solutions, i used the internal SPU, i tried all its options, i tried all the bios for the ntsc playstation as it's a ntsc game i have, i mades isos with the 2 discs, but the problem is still here.
In fact, that problem on the fusioning dragon movie on disc2 is the same that the 1st movie on the disc1, the presentation of chrono cross.
Well i bet it's a more serious problem that the configuration of plug-ins, don't you think?
Anyways, if somebody found a solution for that, that would be really nice to tell me what to do!