The drivers and Audiodesk are different things - you don't need Audiodesk to use the
interface, but you do need the drivers.
you can download the drivers.. goto
MOTU website, click downloads. You have to login to get them. If you don't already have
an account, just register to create an account.
Not sure about Audiodesk,
I've never used it. You don't need Audiodesk to use the Audio Interface/drivers. The
drivers are all you need. Audiodesk is a DAW (Digital Audio Workstation), you don't have
to use it, you can use any DAW software.