About Midjay v.01 (first model)

The main IC is a DREAM 9707, Ibelieve all the sounds are stored in 2 EPROMS MJ-A1 and MJ-B1.I'm thinking replacing those with new loaded sounds, even less but better sapmlers can rebirth this beautiful and sturdy machine.
Anyone temper with those IC, bet it should posibble!
ANy idees?
Vio