Proteus 2000 Composer Sound ROM. This 32 MB ROM offers you all of the bread and butter sounds of E-MU's Proteus 2000, This ROM set contains 1024 diverse presets (8 banks!) that cover the sonic spectrum with everything from traditional keyboards and orchestral instruments to electric guitars, world percussion and drum kits. The Composer ROM will serve as the cornerstone of your sound library, delivering the most versatile and usable collection of sounds ever collected on a single ROM. New old stock item at great price. 90 day guarantee. Limited stock.