One interesting feature of the E-Synth Proteus 2000 combination is the ability to install sound ROMs created in the E-Synth in the Proteus for play back. This would enable any sounds from the E-Synth to be used on the Proteus and I am sure you can see the possibilities.

However, the cost of the ROM authoring kit for the E-Synth (E4) is so high I wonder if anyone has ever bought one.

Paul