Very simple concept widely used in jazz ( but good for other styles). Like shown in the video, G7 and Db7 are two chords a tritone away (tritone=6 semitones) that share the same 3rd and 7th.
G7= G B D F
Db=Db F Ab B
as you see the notes B and F are common to the two chords. This means that I can also substitute the IIm chord that usually comes before it (as in a II-V-I)
I can play both
Dm7 G7 Cmaj7
Abm7 Db7 Cmaj7
If you enjoyed these lessons consider making a donation to support the site (minimum $15): you will get my 4 eBooks+Mp3 examples (The guitar kit Pro, Contemporary Solo guitar, Contemporary Blues Soloing, Contemporary Chords and Comping) and 84 blues backing tracks (divided in 7 sets). A total value of $149 at full price on other sites. More info about the individual products on this page
Use the drop down menu if you want to donate more, it's appreciated! All products on this page are digital goods you can download instantly after a successful Paypal checkout.
Sign up to my mailing list and get free stuff: