Very cool, thanks for the info. I did not mean to say that MAME were the first trying to do exact hardware emulation for synths, just that emulating hardware means a higher workload for the computer. As a note, I see that this project has created its own CPU benchmarks to make sure you can confidently run the emulations with acceptable results so while perhaps their emulation code is more efficient than MAME's --who knows-- the difficulty remains the same.