To highlight the ♭9, ♯9, ♭5, and ♯5 intervals over dominant chords resolving to a tonic.
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Most PDFs focus on notes. Henderson’s focuses on time . You will find exercises for: To highlight the ♭9, ♯9, ♭5, and ♯5
You can find the official version and summaries through these platforms: To highlight the ♭9