Hmm 6 buttons... It depends on what you need. I prefer the group based approach.
- Record/Overdub - Loop 1 in selected group.
- Record/Overdub - Loop 2 in selected group.
- Record/Overdub - Loop 3 in selected group.
- Record/Overdub - Loop 4 in selected group.
- Select Previous Group
- Select Next Group
If you have a controller which supports note on/off you can make use of the hold function for extra options. e.g. Hold button 6 for Play/Stop Session.
Another approach would be to make use of the "Confine Selection To" option for the "Select Next Loop" binding. This would allow you to cycle through the 4 loops in the selected group with one pedal.
- Record/Overdub - Selected loop.
- Mute - Selected Loop.
- Select Next Loop - Set the "Confine Selection To:" option to "Selected Group".
- Select Next Group.
- Play/Stop Selected Group
- Play/Stop Session