Morpheus is supposedly ROM expandable (sound ROMs?)but I haven't been able to find any info. Can anyone help? Thanks.

I checked into this a few months ago. According to the person at Emu I spoke to, they never developed the additional samples for the upgrade. This means the 8Mb PCM block you have is all you will ever have.

Morpheus is so deep, you should never really need the upgrade. There are a few ROM cards out there. I have the Film/Orchestral card. I recommend it!