Re: Please advice/tips for playing Jazz guitar
I tend to say that in jazz it's more about chops than scales. You can shift cool chromatic licks all around the fret board. It doesn't have to be a chromatic lick but arpeggios which you shift to every 3rd fret. Half-diminished and diminished stuff is quite normal to use and that stuff kinda let it sound jazzy.
So you can find melodic motives which you can use to build tension (shift to the next fret).
For example you have a II-V-I vamp in C, so you play Dm7, G7alt. and C-major 7 you can play this:
Dm7__________G7alt_______Cmaj7
e------------------------------
b------------------------------
g-------2--5---
4----3---------
d----3------------5----6--
5---
a-
5---------------------------
E-----------------------------
I made the numbers fat where the new chord is played. So it's jazzy to play Ab melodic minor over a G7..that has this
super locrian sound.
And you can shift this thing over the fret board but the chords stay the same. It has a great effect if it's played faster..be-bop style. So a half tone from the tone "g" you find the Ab and from there you can play a melodic minor scale.
You can also play the tritone substitution (#11) over the G7 chord..play a Db7 arpeggio which builds a lot of tension but when the c-major7 comes everything's is fine
And yeah the whole blue notes are important as it is in Blues. And if you have a C7 for example you can play ths stuff:
e--
11--12--------------------------
b-----------13-------------------
g---------------12---10--
11--
8--9-
d-----------------------------------9
a----------------------------
E-----------------------------
The blue notes are the fat numbers. And you should play it in a swing feel, which helps to play jazzier. Try the same pattern in another region of the fretboard over the same chord but be sure to "come back".