Workshop 81 mini-test

1. What is the difference between an upper-structure triad and a true polychord?

2. Why does register strongly affect polychord perception?

3. Why can C major + D major be heard either as C Lydian harmony or as two simultaneous chords?

4. What happens when C major and E♭ major are combined?

5. Why are common tones useful between conflicting harmonic layers?

6. What makes a brief outside triad sound like an approach rather than a second harmonic region?

7. How can polychordal overlap create modulation?

8. Why should rhythm often remain simple when harmonic layering becomes strongly bitonal?

9. Why can an ordinary consonant chord sound especially powerful after prolonged polychordal tension?

10. What is the deepest lesson of Workshop 81?

Answers

1. An upper structure is primarily heard as supplying extensions/color to one parent harmony; a polychord preserves enough independence that both chordal layers remain perceptually meaningful.
2. Close spacing fuses pitches into one dense sonority and emphasizes semitone clashes, while wide register separation lets the ear group notes into distinct lower and upper chordal layers.
3. D-F♯-A over C supplies 9,♯11,13, so it integrates naturally into C-Lydian harmony; but if C-major and D-major triads are separately established through register/rhythm/repetition, both identities can remain audible.
4. Their E/E♭ conflict creates simultaneous major/minor-third tension while G acts as a common tone, producing a strong but potentially coherent bitonal/blues-like sonority.
5. A common pitch acts as perceptual glue, giving the ear something stable while the remaining notes establish contrasting tonal identities.
6. Short duration, immediate resolution, and lack of independent rhythmic/tonal establishment make the outside triad function as an approach color; longer repetition and autonomous behavior allow it to become a genuine harmonic region.
7. Establish the old key in one layer, introduce the destination key independently in another, overlap them, then gradually remove the old layer and transfer the bass/root gravity to the new one.
8. Bitonality already creates substantial cognitive and acoustic complexity; keeping pulse and rhythm clear allows the listener to organize the harmonic conflict rather than hearing undifferentiated chaos.
9. Tension establishes contrast. After two harmonic worlds compete, their sudden agreement in one simple tonal sonority functions as both harmonic and perceptual resolution.
10. Polychordal music works when harmonic disagreement is organized into intelligible layers whose identities, relationships, and eventual destinations the listener can follow.

The central lesson of Workshop 81 is:

Playing two chords at once is easy. Making the listener understand why both chords are there—and what relationship they have to each other—is the real art.