I'm up to my 7th lesson with my totally awesome Jazz guitar teacher and I must say I'm enjoying it immensely and getting so much out of it. In yesterday's lesson he said something cryptic which I'm still trying to come to terms with in my mind and I sort of roughly paraphrase what he said thus: "....in Jazz at least, the chord names provide a framework that is kind of flexible - just because the chart says Dm7 | G7 | Cmaj7 doesn't mean that that is what might be played by the musicians at any given time. If we take a vertical slice through, we may find the bassist playing the root, but we may also find the guitarist or pianist playing some chord substitution or line outside that leads to resolve later on. Thus, the chord framework is more of a concept than a 'you must play these chords here' and provide a kind of roadmap of where the musicians should roughly go towards, i.e. the resolutions. Where they go in-between is up to them (provided it's musical) and provides, where appropriate, that interesting tension." I found this tension/resolution thing very, very interesting and it's really got me thinking. Does anyone have any views on this and any pointers on how I might internalise this better with examples? I wrote about the whole lesson here which gives a bit more context as to how he came to talk about this, but yesterday's hour was a bit of a milestone for me in getting to grips with this whole Jazz playing over changes thang.