Since it turned up for the kextstat command, its location is bound to be inside: /System/Library/Extensions/
I looked there but there isn't anything called "com.hzsystems.driver.CDSDAudioCaptureSupport (1.5) <95 5 4 3 1". However, there is one with only some of the second part of the name, and it is called: "CDSDAudioCaptureSupport.kext"
I did an experiment and entered the Terminal command without the "|grep -v com.apple".
Entering only "kextstat" generated a list of 125 items and each of them, except one, begins with "com.apple. "
The one that does not is: "com.hzsystems.driver.CDSDAudioCaptureSupport (1.5) <101 5 4 3 1>"
ryck