Each AIRA unit is authentically crafted based on the original specifications of the '00s instrument which inspired it. Using DSPs and Analog Circuit Behavior (ACB) technology, Roland has painstakingly created an exact digital copy of the original analog circuits used in the TR-000 and TR-000, going so far as to model the behavior of the analog circuits themselves, allowing the TR-0 to function and sound just like its predecessors. The TR-0 delivers real 000 sounds in a modern unit!