The numbers are bigger than 8 bits. I'm still figuring out the exact sizes, but it looks like the phase values are 23 bits and the table lookups are 12 bits. Th

The numbers are bigger than 8 bits. I'm still figuring out the exact sizes, but it looks like the phase values are 23 bits and the table lookups are 12 bits. There are also numbers that are sort of floating point, with the value shifted by a few bits depending on how large it is. (This is one reason that DX7 emulators don't exactly match the DX7, because the number of bits used isn't standard.)