Jam Session 104l with Am G D (Piano, Guitar)

Here are some show/lesson/jam session notes for Jam Session 104l:

• A lot of the (electric-)acoustic sounds from these jam sessions are from an electric guitar going through an acoustic simulator effect.  This is sort of effect can be found in standalone stompboxes, multi-effects pedals, and software plug-ins.
• The chord progression is Am G D.

  

Those chords work well underneath melodies, lead-lines, and other improvisations in the G major scale:

However, we are really in A, since Am leads off the progression.  We might want to use the A Dorian mode instead (even though it has the same notes as G major):

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Podcast subscribers: If these jam session notes look jumbled, please visit http://www.chorddujour.com and look up Jam Session 104l 'L' - Thanks!