A lot of the regions added for TR in Tamriel_Data are missing region sounds. Most of these regions have not yet been released, but the following regions are in the latest TR_Mainland yet lack sounds and/or sleep creatures:

• Aranyon Pass Region (lacks sound)
• Mephalan Vales Region (lacks sound)
• Othrelt Woods Region (lacks sleep creature, possibly intentional?) it's been a while, I mistook this for the Lan Orethan. My bad!
• Sacred Lands Region (lacks sound)

I am creating an asset entry for the Sacred Lands region - as that might benefit from some custom sound - but Aranyon Pass and Mephalan Vales could do with some vanilla sounds.