-OGGENCOPTS, FLACOPTS, SPEEXOPTS, ID3OPTS, ID3V2OPTS, CDPARANOIAOPTS,
-CDDA2WAVOPTS, HTTPGETOPTS, CDDBTOOLOPTS, EJECTOPTS, DISTMP3OPTS,
-NORMALIZEOPTS, CDSPEEDOPTS, and CDSPEEDVALUE.
+OGGENCOPTS, FLACOPTS, SPEEXENCOPTS, MPPENCOPTS, ID3OPTS, ID3V2OPTS,
+CDPARANOIAOPTS, CDDA2WAVOPTS, HTTPGETOPTS, CDDBTOOLOPTS, EJECTOPTS,
+DISTMP3OPTS, NORMALIZEOPTS, CDSPEEDOPTS, and CDSPEEDVALUE.