I have in the same project sequences with 1080 59.97, 1080 29.97, 720 59.97, 720 29.97, i create bars and tone for each sequence but i can only monitor audio for the 720 29.97 sequence all the other settings are the same for all the sequences. The audio meter is working fine for all sequences.
Production premium CS6
x2 intel Xeon 2.4 ghz
32 GB RAM
Solid State 512 GB
ATI RADEON HD 5770 1GB
Black Magic DeckLink HD Extreme 3D
The odd thing is that al the sequences are in the same project with the same configuration but i can only monitor the 720 29.97.