AGO Improvisation Techniques 3 — Questions and Answers
Question 1: Which formal design would be most appropriate for improvising a Baroque-style prelude and fugue?
- Rondo with five refrains
- Free toccata followed by a strict imitative section (Correct answer)
- Binary form with repeat signs
- Theme and variations
Correct answer: Free toccata followed by a strict imitative section
A Baroque prelude and fugue traditionally pairs a free, improvisatory toccata-style opening with a strict imitative fugal section.
Question 2: When building tension in an improvised organ piece, which registration technique is most effective?
- Gradually removing 8' principals
- Progressively adding mutation and mixture stops (Correct answer)
- Switching to a softer Celeste
- Keeping registration constant throughout
Correct answer: Progressively adding mutation and mixture stops
Adding mutation and mixture stops progressively builds brilliance and density, effectively creating a crescendo effect on the organ.
Question 3: What is a 'head motive' in the context of organ improvisation?
- The final cadence of a piece
- A short, distinctive melodic cell that begins each section (Correct answer)
- A registration preset
- The pedal line in a fugue
Correct answer: A short, distinctive melodic cell that begins each section
A head motive is a short, memorable melodic idea used to begin sections and unify an improvisation through recurring reference.
Question 4: In improvising a liturgical postlude, which approach best demonstrates professional musicianship?
- Playing random scales to fill time
- Developing material thematically from the service's closing hymn (Correct answer)
- Repeating the prelude verbatim
- Improvising in an unrelated style to the service
Correct answer: Developing material thematically from the service's closing hymn
Developing material from the closing hymn creates liturgical unity and demonstrates intentional, service-integrated musicianship.
Question 5: Which contrapuntal device involves stating a subject upside-down (reversing the direction of intervals)?
- Augmentation
- Inversion (Correct answer)
- Stretto
- Retrograde
Correct answer: Inversion
Inversion presents a melody with its intervals reversed in direction—ascending intervals become descending and vice versa.
Question 6: What harmonic function does the Neapolitan chord (bII) typically serve in improvisation?
- Dominant preparation leading to V (Correct answer)
- Tonic substitution in major keys
- Subdominant prolongation in minor
- Leading-tone function
Correct answer: Dominant preparation leading to V
The Neapolitan chord (bII6) typically functions as a pre-dominant chord, intensifying the approach to the dominant harmony.
Question 7: When improvising in a Romantic style, which technique characterizes the 'con moto' approach?
- Static, drone-based harmonies
- Flowing, continuous melodic lines with subtle agogic accents (Correct answer)
- Strict metric pulse without rubato
- Bare two-voice counterpoint
Correct answer: Flowing, continuous melodic lines with subtle agogic accents
A Romantic con moto style features expressive, flowing melodic writing with slight rhythmic flexibility (agogic accents) to shape phrases.
AGO Improvisation Techniques 3
Which formal design would be most appropriate for improvising a Baroque-style prelude and fugue?