When I tried to patch the Apple HDA binary, here is the output I got
OSX version 10.9.4 detected
Patching AppleHDA codec 11d41984 with 10ec0269
2 codec range comparison(s) to patch
Patching range comparison 10ec0884
Patching range comparison 10ec0885
Found no matching codec to patch. AppleHDA may already be patched
Aborting with AppleHDA NOT patched
This may be my problem.
This is the original 10.9.4 file. I tried it with files from two different machines.