Hi, I have several older computer systems that I use for music production. They all work well, I see no reason to upgrade for the sake of upgrading if things are still working. Specs: ** Pentium 4. ** 2.87ghz. ** RAM = (some have 2gb, one has 4gb thanks to TB member UncleFluffy). ** Storage = 80 to 100+gb onboard plus a few 2TB+ external HDs. ** OS = Win XP Home Edition v2002 SP3 ** Audio Interfaces = several M-Audio "Audiophile USB" w/ their latest ASIO drivers. ** DAW = Sonar 6.3 Producer's Edition --AND-- Project 5 v2 (for midi sequencing, it's way easy to use for that). What I would like to know is how do I go about reducing I/O latency. (I may have used the wrong term). What I am speaking of is better response (shorter/faster) when I use VST/Soft synths. I am nearly ready to buy the downloadable Arturia SEM softy, and I already have MANY Arturia and Native Instruments soft synths as it is. My only hesitation is due to that latency issue. I plan on dedicating one of the laptops to just P5 and the softsynths, and using that laptop as if it were a midi-multisynth and running it's audio out one of the AIs and then into anothert computer that's running SONAR for audio recording. I was hoping to learn how I can have reliable latency times sub-5mS. I think I'm getting about 8mS now (I'd have to check) with my favorite ones (MinimoogV and CS80V). Is that the best I can hope for? Y'know, it just struck me --- aren't most ADSR envelopes equipped with "ATTACK" times of no shorter than about 4 or 5mS anyhow? I mean on the real hardware versions? (shakes head quickly - comes back to reality and the here/now) Anyway am I at about the best I'm going to get at 6 to 8 or so mS latency from the time I press a key on my controller keyboard until signal leaves the AI? I guess there's other factors involved - midi-latency (time from key-press until it gets inside the system) added to audio latency. Ugh ... the horror! Thanks ... always learning.