So when was volume control enabled under 10.6.8 for Firewire Audio interfaces?

[clay]

Just fired up my MOTU firewire interface, and noticed that I now have the ability to control volume that's routed through the interface. Previously, the volume control was greyed out (inaccessible) and I had to control volume on the interface itself. Don't know if this was something Apple added in an OS update, or whether this is something that was enabled with a MOTU audio software/driver update.

Anyone else with a firewire audio device have the ability to control volume via the computer?