Macbook Pro 2.5GHz Intel Core 2 Duo 4GB RAM OS X 10.5.4 Edirol UA-25 Sennheiser 416 Soundtrack Pro 1.1 or Garageband '08 I get either a slight latency or an echo (sort of a hollow echo-y sound as if in a cave) when I'm monitoring my recording through headphones but the recording sounds great when I listen back. No boomy echo at all. I'm inclined to call it latency because it seems as if I can hear my voice mili, nano, pico seconds before I hear them boomy through the headphones. It happens no matter whether I monitor through the Edirol or plugged directly into the Mac and I've heard it using both Sountrack as well as Garageband. I get the same effect if I put the mic in diff. environments or use the computer. mic. Any thoughts on what could be causing it or what else I might do to fix it before it drives me insane? Thank you.