Hi Roman, > Can pro tools TDM give real time guitar effects etc whereas UAD-1 has > prohibitive latency? > Yes. > How does pro tools offer these advantages? > Through it's unique "time division multiplexing" technology. TDM for short. It uses phone related technology in it's dsp architecture in order to route data around with next to no latency. This propietary architecture is one of the reasons why TDM is so expensive. -- Eli Krantzberg Nightshift Orchestra / Almat Productions http://www.nightshiftorchestra.com