When it comes to source-built releases, there always seems to be that one glaring issue that lingers around long after the others are fixed. For instance, last year the EVO 4G developers had some trouble with getting WiMAX on CyanogenMod 7. Usually it is something minor like the camera or Bluetooth. Two devices that have struggled with this are the ASUS Transformer Prime and the AT&T Galaxy Note.
The original mod for the Transformer Prime was created by XDA Forum Member eSbek and was later tested and confirmed working on the AT&T Note by XDA Forum Member linkkoriri. Given the large number of differences between the ASUS tablet and the Samsung phablet, the method is likely compatible with other devices as well.
It only works CM10 and ROMs based on CM10, so if you’re running a different build, you may be out of luck. To use, download the mod and replace the audio_policy.conf file with the one you downloaded. After that, reboot and you’re done! For the Galaxy Note owners, it has also been confirmed that using the audio_policy.conf from the Galaxy Note 2 dump.