can someone help me on HALO 3: ODST AUDIO?

[Henry]

i passed the game but then i started a new one to look for the audio but some of them were off and i never got them but others were on can somebody help me?

 

[icomet]

Stop supporting a fail product..
You wasted your $60 on an expansion for Halo 2.

 

[Phoenix]

When you start a new campaign you have to restart collecting the audio logs, for example if you missed all 30 the first time around.

I'm using http://nextgenwalkthroughs.com/Halo_3_ODST_Audio_Log_Locations
to make sure that I get them all on the next go.

Do note that the 30th can only be obtained after you have the other 29 before starting the level Data Hive.