This video, via mvpadrini, looks at using an iPad and S1MIDItrigger to create a new ‘virtual panel’ for the Korg microKORG.
The virtual panel exposes 36 MIDI parameters to be changed in real time, allowing for much faster patch editing.
I’ve been working on a similar touchscreen editor for a Sequential Circuits Six Trak. Adding a multitouch controller to a vintage synth – especially one that has only one knob, like the Six Trak – introduces a new level of immediacy and interaction.
Note To iPad Developers: multi-touch control & patch management for vintage synths with social sharing – get on it!.