def comments(input_filepath):
validate_input_file(input_filepath)<EOL>output = soxi(input_filepath, '<STR_LIT:a>')<EOL>return str(output)<EOL>
Show file comments (annotations) if available.

Parameters
----------
input_filepath : str
    Path to audio file.

Returns
-------
comments : str
    File comments from header.
    If no comments are present, returns an empty string.