Comment 17 for bug 653446

Yes. The topic of volume "balance" is a actually more complicated than one would assume. The issues are (as described in the former comments) how to handle "upper bound" and "lower bound", and also whether to store (internally and for persisting/restoring) absolute or relative (or both) values and possible issues with rounding for controls that do not use the range 0-100.
I think something like the "upper bound" handling like in Gnome can be done easily.