[vegggdor]

Instead of text editing, sliders and knobs to manipulate values work well. Music lends itself well to graphic interfaces, because of it's sequential nature, you don't usually work with text or conditionals. Especially for the _feedback_ anything visual works a treat though.

With expert systems you work blind half the time, because of the size, that you can't get all into scope. So you simplify and make abstractions, but it's complicated to map multidimensional decision space onto 2d. Therefore a good visual programming environment would have to be a complicated system, that, well, you'd have to learn to navigate and memorize.

Don't know what you mean, how to _incrementally_ add or reset a button, like Undo/Redo?