After you install the SDK, you need install this driver:
/Developer/FireWireSDK23/FireWireComponents/FireWireAudio 2.0.1/AppleFWAudio-2.0.1fc1-e8.pkg
From the release notes:
Known Issues
Most of the problems that have been reported by FireWire audio hardware developers have been resolved in this release. If one of the issues you have reported is not fixed in this release, contact DTS with your issue number and they can check the status of the issue if it has not already been updated.
For the new streaming engine:
• Latency varies between +/- 8 samples. We are working with the FireWire audio silicon vendors to resolve this issue.
• On rare occasions on Intel machines a large round trip latency will be observed. This occurs most often on machines with S800 port.
• On Intel machines with S800 ports sometimes the audio device will not have any audio when the machine is rebooted. To work around this issue, switch to a different sample rate and then back again and the audio will be restored.
For all devices:
There may be times when a FireWire audio device will not show up after a reboot. This version of the driver is more stringent about the responses and values returned from the device. If there are any serious errors or extended timeouts from the device during enumeration, the driver will stop querying the device and fail the device enumeration. If this happens a message will be printed out in the system.log file. If your device fails to enumerate often, you may need to modify your devices firmware to the latest version from your silicon vendor or modify some of your existing commands to respond in a timely fashion with the correct values.