I tried and once 32bit windows is installed on a MBP running 10.9.1, I cannot successfully use a 32 bit audio device with the 32 bit windows 7 VM. While the device is sensed by Windows and the drivers install properly, I cannot use this device in an application. It just doesn't work. I tried manipulating the driver settings and was able to get some sound coming in from the device (It's a 32 bit stereo mic preamp), there is significant latency in the audio signal that makes it unusable.