I tend to agree with all said here, especially Simon's comments. I often play with a friend who plays the keyboards and when practicing certain songs that have some more let's say complicated chords he might play the extentions while i play the simper chords on the guitar. The crowd hears the proper notes and are none the wiser. I find a good way to solve this in a recorded song is to use a midi track for something like the piano and then add the guitar part more simplified. Just my take nothing earth shattering or fancy but it works.

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