GuitarGuide is a textbook primarily answering the question how chords are created and structured within the frame of western music and how to select a tonal scale to improvise over the chords in their actual musical context.
Press 'Open Impro Tool' to open the 'Music Improvisation Tool'. Select 'Open MIT Manual' to open a description on how to use the tool. Cannot be downloaded from there. To download the 'MIT manual', select 'Open MIT Examples', to open a panel with further examples on how to use the tool - plus download the manual.