PARA_ERROR(AO_APPEND_OPTION, "ao append option: memory allocation failure"), \
PARA_ERROR(AO_BAD_DRIVER, "ao: invalid driver"), \
PARA_ERROR(AO_BAD_OPTION, "ao option is not of type key:value"), \
- PARA_ERROR(AO_BAD_SAMPLE_FORMAT, "ao: unsigned sample formats not supported"), \
PARA_ERROR(AO_DEFAULT_DRIVER, "ao: no usable output device"), \
PARA_ERROR(AO_EOF, "ao: end of file"), \
PARA_ERROR(AO_FILE_NOT_SUPP, "ao: file io drivers not supported"), \