hmm, interesting results. hope they see this and re-render the soundtrack in glorious 8-bit
it's not about number of cores unfortunately.
cores only help if a program has beed designed to use multiple threads. this isn't typically done as there's only a few appliactions where it's obvious and easy to multi-thread the program (video encryption being one).
multi cores also help running multiple programs as each can be assigned it's own core (or in dual core, one can focus on the program in use and the other can keep the background processess running).
so it typically still comes down to speed.
you 've got 2.33ghz, mines 2.5ghz, a quick look at the spec the min is 2.4ghz and recomended is 3ghz.
will they optimise the sound? who knows. but i'd pester them as SD typically likes things to run on as low spec as possible and if sounds cocking things up like this hopefully it's a relatively minor fix. of courese this would be down to GPG to fix, so...