I did some digging in Google for your interface and found some things to check.
1. Please go to device manager and look at the properties for your Focusrite interface. I want to know PRECISELY what it is using for drivers. Please respond with that info. Apparently, Windows may install ITS drivers for this, which are useless. Just something to rule out quickly. If the right drivers aren't installed, just manually install the correct ones for your interface. The Focusrite doc online says there is a Windows driver update that was released on 02/02/2012.
2. For my Presonus Audiobox 1818VSL interface, it most DEFINITELY has to have matching sample rates between the interface and Sonar, or no sound comes out. I would imagine this may be the issue for you.
3. Your interface may be built for USB 1.1 ports (the doc online says it is for USB 1.1, but their driver text indicates it is for USB 1.1 and USB 2.0 devices, so I don't really know). Be careful what you are plugging it in to on your computer. My Presonus interface FREAKED when I plugged it into a USB 3.0 port. There are also additional factors when using Intel i3, i5, or i7 chips. Here is some documentation from the Focusrite systems requirements page on the web:
Connectivity of USB 1.1 devices on non-root hubs
We have found some problems with USB 1.1 devices attached to non-root USB hubs on Windows 7. The cause appears to be a problem in the way Windows handles non-root USB hubs.
Some of the symptoms of this problem are listed below:
- Interface fails to stream audio at low buffer sizes (below 3ms).
- Device fails to connect when other USB 1.1 devices are in use and connected to the same non-root hub.
- It's not possible to use other USB 1.1 devices when the 6 USB is connected
- Device shows in device manager (under 'Sound, Video and Game Controllers') but doesn't appear in Windows' sound preferences.
- Streaming of Windows sounds is possible but the Focusrite USB ASIO driver gives an error message when selected.
Whether a device is connected directly to a USB root hub or Generic USB hub can be found in the Device Manager, found in the Control Panel. You should then choose the option 'Devices by connection' in the 'View' menu.
If it is correctly connected to a USB root hub it will appear like this:
If it is incorrectly connected to a generic USB hub it will appear like this:
The problem is particularly prevalent on the new Intel i-series chipsets (Core i3, i5 and i7), both in desktop and notebook format, as these chipsets do not provide a way to connect directly to the root hub.
The workaround is to attach a new USB root hub and connect the device to that instead.
Desktop users can add a PCI or PCIe USB card, which will work as long as the card does not have an internal, non-root hub. 4. I also found online postings of folks having generic Windows trouble where the 'unable to open recording device' message appears. You might want to just cruise through some Google results searching for that message text, and see if any of that may apply.
I don't for the moment know what else to suggest.
Please respond after reviewing the above and seeing if anything there rings a bell (even if you can't hear the bell ringing because no sound comes out of the interface - sorry, couldn't resist that).
Bob Bone