This is a great example of the different UX demands of pure creative tools. If this were for getting "work" done then it would be an awful interface: it gets in

This is a great example of the different UX demands of pure creative tools. If this were for getting "work" done then it would be an awful interface: it gets in the way of you programming the result you want. However in the world of music, inspiration and serendipity are just as important, if not more so. An awkward-yet-still-fun interface can imprint itself onto the distinctive sound of a device just as much as any of the audio-generating circuits. The 303, counterpart to the 808, is a famous example of this. Try and program in a preconceived, sensible melody and you'll be tearing out hair out. Bash in a semi random series of button pushes and the thing will produce instant acid techno.