Most
people, who play lead guitar, improvise only in an accompanied
surrounding with drums, bass, rhythm guitar and maybe horns. If asked
on the spot, to play an acoustic guitar at a party, playing a few leads
will bore everybody.
With the creative ability that they have honed, there is no
reason they can't apply the craft to a more chordal orientation.
Different styles of music, other than heavy rock, lend themselves to
guitar improvisation, such that one, who knows something about chords
and scales, may develop a more rounded way to improvise. This way, they
don't depend on other musicians to accompany them.
With that in mind, these exercises demonstrate and open up
different possibilities of guitar improvisation.