You can get a Genesis Digital Lens, which is a jitter killer but will also do any conversion you may ever need (it has AT&T, RCA, AES and Tos inputs and outputs), but it is more costly solution ($400 used) and adds another box.
On a positive site, it will improve the sound of your Apple TV.
Some types of Theta TLC (around $100 used) also came with AT&T output and Tos input. Those fitted with AT&T are hard to find though.
On a positive site, it will improve the sound of your Apple TV.
Some types of Theta TLC (around $100 used) also came with AT&T output and Tos input. Those fitted with AT&T are hard to find though.