It is a basic sample-based module. To make it sound more realistic, producers often suggest varying velocity and adding a sense of space (reverb) to avoid a "flat" sound. Technical Limitations:
TPS has announced a "Woodwinds Module" for Q4 of next year, which will integrate directly with this Brass engine using the same CC mapping. If you buy the Brass now, you get a loyalty discount on the Woodwinds later. TPS - Brass Section Module VSTi
TPS sits perfectly in the middle. It has the sampled realism of a recorded orchestra (unlike pure modeling) but the fluid control of a modeled instrument (unlike rigid samples). It is a basic sample-based module