Just revisited your kextcache log and noticed this. Did you replace the AppleHDA.kext in /S/L/E?
You will have to restore the vanilla AppleHDA.kext to /S/L/E, repair permission and rebuild cache.
Kext rejected due to improper filesystem permissions: <OSKext 0x7f8560e0d8d0 [0x7fff98e80570]> { URL = "AppleHDAHardwareConfigDriver.kext/ -- file:///System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/", ID = "com.apple.driver.AppleHDAHardwareConfigDriver" }
See if that fixes the audio after restoring the vanilla AppleHDA.
Otherwise, we'll try patching your DSDT/SSDT
Boot to Clover GUI, hit F4, continue to OSX
Compress and attach /E/C/ACPI/Origin folder here, I'll patch the files for you
What version of BIOS are you on?