-Provide a 2-tuple as argument for command supporting ranges (cf. `MPD protocol documentation`_ for more details).
-Possible ranges are: "START:END", "START:" and ":" :
+Some commands (e.g. delete) allow specifying a range in the form `"START:END"` (cf. `MPD protocol documentation`_ for more details).
+
+Possible ranges are: `"START:END"`, `"START:"` and `":"` :
+
+Instead of giving the plain string as `"START:END"`, you **can** provide a :py:obj:`tuple` as `(START,END)`. The module is then ensuring the format is correct and raises an :py:obj:`musicpd.CommandError` exception otherwise. Empty start or end can be specified as en empty string `''` or :py:obj:`None`.