Then he starts out talking about chord colors and how he likes to use different shapes or chord voicings than standard. That's what the lesson is about really.
Extensions using extended chord shapes to differentiate your self and also throwing a little bit of signal chain effect on it to get a vibe feel.
He'll give us his slant on harmonic concepts, line playing, modes and things that will help us play in a group situation live.
Andy is an advanced player and is probably going to teach us new concepts so I'll venture to say this isn't the ideal choice for your first guitar lesson.
Andy calls music a 'palette of color' and tells us that he tries to avoid conventional harmony while looking to imbue 'dissonance' and 'edge' to his chord voicings.
He mentions static harmony and that a lot of his chords are made up of 2nd and 4th intervals and parallel 5ths. Then he plays us one and puts a smile on our face. He compares it to a standard bar chord using an E shape and says he tries to get the voicing to stand alone more.
Pointing out, quite rightly, that these more open voicings don't demand resolution as much as the standard shapes. His guitar sound is wet. Later he confesses to using echo. Sounds like delay to me but I am still learning.