I present to you the file I currently have, flash using the following steps:
Make sure you're using TWRP 2.3.2 or higher. (Earlier versions don't support 4.2)
1. download the file.
2. download gapps (search google. Hint: gapps-jb-20121212).
3. put them both on your sdcard.
4. reboot into recovery.
5. wipe "system" and factory reset.
6. flash the downloaded file, then the 4.2 gapps that you downloaded and reboot.
-Audio in speaker, headphones.
-Radio works with LTE speeds.
What doesn't work:
-In call audio.
This rom is tested and should work on these similar devices:
1. AT&T Note 2
2. T-MOBILE Note 2
3. International LTE Note 2
If you want to revert back to a jellybean 4.1.x rom. You'll find that all of your internal sdcard content is moved to a subfolder called 0. This is due to Android's new implementation of multi-user accounts. To get your files back to how they used to be, I created a little cwm file that you need to flash after restoring an old backup or flashing a 4.1 rom. Remember, you flash this file AFTER you restore or flash a 4.1 ROM. The file you need is attached.
Dec 14: http://www.mediafire.com/?rzb9uipj801v1cp