A better mixer

[thejpster]

You should be able to set multiple mixer values in one command.

You should be able to adjust mixer settings graphically, with the arrow keys.

You should be able to 'lock' two mixers with the same name except for one ending in L and one ending in R. They start 'locked' if they have the same value and when locked they adjust together. You can unlock by setting one differently, or by pressing 'space' in the GUI.