I think I read somewhere that Paula is a 16 bit chip with 8 bit DACs so that it actually loads 2 8 bit samples at a time. I am not sure if this is anything useful, though. Perhaps a Paula 16 AHI driver could be written? This might also lower the sampling rate of the chip since it achieves 28KHz 8-bit maybe the max would be 14KHz 16-bit (yuck)