Add AppleALC.kext and Lilu.kext to your bootloader's kext or Other folder, copies of recent kexts attached below.
You need to use layout-id=11 or layout-id=13 with this Conexant Audio Codec.
This can be added to your config.plist in a number of ways: Choose only one!
1. Boot argument alcid=11 or alcid=13
2. Devices > Audio Section of Clover config.plist - Audio Injection
3. Devices > Properties Section of config.plist - Audio properties
Remember only use one of the three methods shown above.
IF layout-id=11 doesn't work try layout-id=13, both can be used with your codec.
When testing to see if your Audio is working you need to have a look in a couple of locations:
System Preferences > Sound > Output tab, to see which devices are available. If you don't select your speakers from this tab you will have no sound even if the device is active.
The other location is System Information > Audio report, this should show the audio devices that are available, including speaker output, microphone in etc. Plus any other Audio devices connected to your system.
Hope this helps.