The channel selection is only used if the directive
is set to "Selected". Important: after entering a selection,
do not forget to hit <return>!
There is a simple parser reading the input selection. The following examples
should explain how it works.
- 1-20: parsed into 1,2,3,4,5,6,7,8,9,...,20
- 1-10,12,15-20: parsed into 1,2,3,4,5,6,7,8,9,10,12,15,16,...,20