Diagram of a data history buffer used to delay and interpolate simulation results. The simulation i is issued at source time t_S,i. The resulting propagation parameter is stored within the buffer using the receiver time t_R,i, i.e. it is delayed by the respective propagation delay τ_i. On the other hand, the auralization thread requests a parameter at t_now referring to the current audio block (real-time), which is determined using the specified interpolation method.