I am getting more than a little sick of this iPhone SDK and its documentation...
I am calling AudioConverterNew
in the documentation under Returns: it says \
Most time maybe you just need to find the error code in the .h files
I just made a python script to find the code (when you debug/print a osstatus code)
https://github.com/sprhawk/MyGist/blob/master/tools/find_osstatus_error.py