Using Echo Audiofire on aluminum MacBook Pro causes total freeze

Hey everyone,

So I have an Echo Audiofire 8 digital audio interface. Picked up the new alumimum MBP because I wanted more power to facilitate more plugins and tracks than my first-gen MacBook could provide during audio production.

I just got a firewire 800 to 400 cable from monoprice in the mail, so I was totally happy to fire up the new computer with my audio software. However, I can't get either OS (using XP on Bootcamp, too) to work with the Audiofire. In OS X, I switch to the Audiofire in the sound menu but no sound occurs in any program. Although, the system continues to work and when I switch back to the built-in sound everything plays fine.

In Windows, playing any file in iTunes, VLC, or Windows Media Player makes the system completely unresponsive (mouse freezes, everything freezes) and requires a hard reset. I of course shut down the Audiofire too, then turn it back on and then turn on the MBP. Selecting the Audiofire as a sound source in either the XP control panel or the Nuendo audio settings causes a total system freeze too.

I've got all the latest drivers and updates across the board so I'm totally scratching my head here. Is it a device setting I'm overlooking somewhere? Or could it be a bad cable? Has anyone else seen this happen too?

Thanks