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 \
This is not a direct answer to OP's question, but I think it will be useful to whoever is concerned with these OSStatus return codes:
Search for keyword "Result Codes" in Xcode documentation (Organizer) and we get a more or less categorized return codes documentation sections in the "System Guides" result.
If you just need to use some codes directly in your custom functions, they are very helpful.