Fran,
I read your post and decided to call my source for support at Roland US. You are correct that you cannot connect a foot switch that would stop the arranger from changing chords while you play a solo's from the guitar, either as a guitar sound or as a synth sound.
However, I would like you to try something I mentioned to Roland and they said "try it". Plug your midi guitar in, select the NTA midi channel on the G70 (defaults to channel 14).
Go to arranger settings, set the chord fingering "type" to say "piano style". Set the "zone" to say "whole".
If I'm correct, you should be able to play your guitar with at least 3 note chords and if you play single notes or two notes the chords should not change. On other brands I've been doing this for years. I don't have a midi guitar to try this out. Please report back.


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George Kaye
Kaye's Music Scene
Reseda, California
818-881-5566
www.kayesmusicscene.com