DESCRIPTION:
The TB Midi Stuff app on the iPad is great for controlling the Roland GR-55, however you need both hands to play guitar/bass, so with the addition of the compact Keith McMillen 12 step midi foot controller you can control the essentials with your feet, while still getting patch feedback on both the iPad and 12 step. It also gives you an external expression pedal for assigning to whatever you like.

An added bonus is the ability to control Tabletop (or any midi controllable soft synth) on the iPad. In this instance I'm using the 12 step to control the RS4000 synth for bass notes and Gridlok for triggering samples.

This a pretty basic demo of this whole system in action.
Roland GR-55 guitar synth (running in bass mode)
Keith McMillen 12 step midi foot controller
iPad running MidiBridge, TB Midi Stuff and Tabletop

Control the following from the 12 step:
1. GR-55 program changes (instant access to around 12 patches "per octave")
2. GR-55 voice and effect block controls. Direct access without having to "assign" for every patch
3. Tabletop synth (for playing bass notes with the 12 step while doing other things on guitar/bass)
4. Tabletop sampler (for triggering samples with the 12 step while doing other things on guitar/bass)

All four control destinations are easily switchable from the two buttons (S1/S2) on the GK controller on your guitar/bass.

For detailed instructions on how to set this all up (with downloadable TB Midi Stuff template and 12 step preset files) please head to
www.bassmode.info

This video is primarily about showing the controls working so it's not particularly enlightening musically, my apologies.