I have the slow audio problem on my SAM460 (amongst other issues).
PCI info shows up as "Unidentifyied Multimedia Device" Vendor code 0x1002 product code 0xaa90. Don't know if this is some new device Acube is now using as apparently sounds works for other people.
Older driver: Sound is ok except for playback occuring at about 95% speed.
Current driver: Sound plays at the right speed but there are crackles and pops
Perhaps I should have got a SAM440 afterall.
Lawrence