How would I find out if an application installed the wavtap.kext as part of its package?
So, it turns out that WavTap.kext was installed as a part of the Spotydl package, an application that I had uninstalled nearly immediately and erased most traces of. Removing the WavTap.kext and the Spotydl .plist and .bom appears to have resolved some of the coreaudio errors, though, a reboot will be required to see if the component errors are still present and it seems unlikely that this issue was the cause of those. 

If anyone is aware of a simple uninstaller which parses the InstallHistory.plist, please, let me know about it. Thanks