Then you can only adjust one thing at a time—so you’ve just created the worst of both worlds with a multi-touch display and live music software.

There is absolutely no way you successfully adjust two knobs at the same time on a multitouch display, let alone while doing live music. They are barely usable one by one.

There is a reason people serious about doing music keep using physical knobs to change values in their software. I’m entirely convinced the sole reason DAWs use virtual knobs despite them being such a poor UX element is because people will map them to MIDI knobs anyway and that keeps the software and physical world looking the same.

> There is absolutely no way you successfully adjust two knobs at the same time on a multitouch display, let alone while doing live music

I do it all the time on an iPad. It handles up to 5 simultaneous controls very well.

Same here

There's a demo app for the original iPad multitouch display, which can distinguish eleven simultaneous inputs.

Prompting the obvious question: Why eleven?

You don't ever use your nose as an additional input device? I thought everyone did that.

Kind of a self fulfilling prophecy then. I had to figure out how to map the knobs to MIDI hardware because it was so hard to adjust them on screen!

At that point I guess the physical resemblance is a virtue.

Then you can’t see the value at a glance though.