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In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them. Once you have downloaded your new driver, you'll need to install it. Most major device manufacturers update their drivers regularly. To find the newest driver, you may need to visit the Avid website. It is a software utility which automatically finds and downloads the right driver. Tech Tip: If you are having trouble deciding which is the right driver, try the Avid Driver Update Utility. In the results, choose the best match for your PC and operating system. Enter Avid Fast Track Ultra 8R into the search box above and then submit. If the driver listed is not the right version or operating system, search our driver archive for the correct version. After you complete your download, move on to Step 2. To get the Fast Track Ultra 8R driver, click the green download button above. Hope this helps.How to Update Fast Track Ultra 8R Device Drivers Quickly & Easily Step 1 - Download Your Driver It shouldnt be necessary to change the key name itself. HKEY_LOCAL_MACHINE\SOFTWARE\ASIO\M-Audio Fast Track Ultra ASIO (64-bit) I havent tried it but I'm assuming that changing the string description of the driver stored under that key will be sufficient to allow it to load. Anyway for users of earlier versions of SONAR you should be able to work around this problem by renaming the driver string in the registry to something smaller than 32 characters. It blues screened immediately after installing the driver even before i launched SONAR :) Seemed ok after the reboot. The newest driver wasn't particularly stable on the machine I tried it on.

I worked around it in our code and indeed the driver loads and works fine after that.

The 32 bit driver string is shorter and so doesnt run into this problem. Since the 64 bit driver string for the fast track exceeds 32 characters the string comparison fails and SONAR never sees the device.

The code that tries to open the drivers compares the driver name string with 32 character string. The problem is caused by a bug in the ASIO sdk. I tried this and indeed the X64 drivers do not show up in SONAR.