Watch the Improvising over a Jam Track Shape 1 Demonstration online guitar lesson by Rob Garland from Melodic Soloing: Major Scale
Improvisation demonstration using Shape 1, key of C. The chords are C-Em-Am-G, the tempo is 115 BPM.
Here we're creating an improvised melody based around just a few notes and trying to repeat it as the chords change, with embellishments and changing the rhythm, remaining inside the major scale Shape 1.
Notice how I repeat the first melody idea and try to create a theme as the solo progresses rather than playing unrelated licks. Leaving space and playing rhythmic phrases help keep it interesting.