Honestly man, you are always going to have latency problems with those USB interfaces. Your best bet is to pick up a firewire interface. There are a few of them out there that are relatively inexpensive.. check out the M Audio Firewire 410 or Firewire Solo... I work for Guitar Center, and I hear complaints about latency with USB interfaces all the time. That Tascam interface you have is a good interface for the money, but if you want 0 latency, you should pick up a firewire interface or possibly one of the creative labs audio cards.. the 0404 is like 100 bucks and it's gonna be a ton faster than that tascam interface.