If you are converting files from the Sony HXR-NX5U camera and there is no sound in the resulting CineForm files, browse to the following folder:
C:\Program Files\Common Files\CineForm
or if you are running a 64-bit OS:
C:\Program Files (x86)\Common Files\CineForm\
Then double click on the file called, mc_dec_mpa_ds.ax'.
If windows asks you how to open the file, browse to:
and select 'regsvr32.exe'
You should get a message saying that the file successfully registered.
Then convert your files again and you should have audio.