Just wanted to drop a note here to let people know that Knobbler is available now as a native iPad app.
I started working on Knobbler about 5 years ago after getting frustrated with working on more than one song using my BCR-2000. It's been through many many iterations (first using TouchOSC), and now it's pretty awesome as a Max for Live device + native iPad app.
Check it out in the Apple App Store or read more here: https://plugins.steinkamp.us/m4l-Knobbler4
I'm also looking for beta testers for Knobbler for Android tablets. Drop me a reply here or email me at zack@steinkamp.us if you're interested. Thanks!