Here's the preset.
First, I don't play guitar; I play a six string bass as a solo instrument (chords, melody, etc). So, the settings, especially the amp and drive, have been radically adjusted and are not going to sound good with a guitar. Thus, the preset can give you an idea of what I'm doing, but you'll probably want to build your own preset for what you're wanting to do.
The song this preset is designed for starts with a single chord, which is then held by clicking a control switch, and which is faded in with the expression pedal. Then a second control switch changes signal paths, and I play an improvised line on top of the held chord. At the end of the song I fade out the held chord with the expression pedal while fading out the last chord of the improvised line with the instrument's volume knob.
There are two parallel signal paths. The bottom path is the held chord, the top is the lead. There is only one scene.
Control Switch 1 is Reverb Hold
External 4, the expression pedal, is attached to Reverb Level
Control Switch 2 is attached to Drive Level to turn off the bottom signal path (so that the held chord is the only thing happening on that path), and is attached to Amp Master Volume to turn on the lead line signal path at the same time.
If I recall correctly, I think it's the Reverb Time of 8 seconds that enables the held chord to continue for the duration of the song. (It's a short song, about two minutes; I'm not sure how long the signal will last beyond that.)
So the only switches assigned on the AX8 are the two control switches; and there's the one expression pedal.
Drive is FET Preamp.
I hope this is helpful.
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