In this guitar masterclass, Jack provides an in-depth lesson on secondary dominants and approaches for soloing over them. He begins by explaining secondary dominants as harmonic devices that create tension and lead to different parts of a chord progression or song. Jack demonstrates this with an A minor to E7 example.

Jack discusses learning the notes of dominant 7th chords, like E7, and practicing arpeggios to navigate these chords on the fretboard. He shows how to blend these arpeggios with minor or blues scales when soloing. Jack also introduces playing diminished chords, like G# diminished, over dominant 7ths to add tension before resolving. He demonstrates moving these diminished chords around the neck in minor thirds.

The discussion then turns to applying these concepts in a blues progression. Jack solos to demonstrate targeting chord tones, using arpeggios and diminished ideas over the changes. He also addresses scales like altered and harmonic minor that can expand the sound. Throughout, Jack emphasizes understanding the harmonic function of chords to inform improvisation.

In this in-depth masterclass, Jack provides a comprehensive lesson on approaches for soloing over secondary dominant chords and demonstrates their application over different progressions.