Spectro-morphological Structuring Process in Gilles Gobeil’s “Le Vertige Inconnu”

Section D

Introduction | Spectral Overview | Section A | Section B | Section C | Section D | Section E | Summary | Resources

Like section C, section D serves to further develop both previously heard sounds and structuring principles. The textural iteration motif from section A returns in section D. The spectro-morphological connection between the mechanical sounds and insect sounds was presented in section A when they were introduced in consecutive textural subsections. Now Gobeil’s brings the spectro-morphological connection of these disparate sound sources into high relief. As seen below, the insect iterations and mechanical iteration are neatly aligned, demonstrating to the listener their morphological similarity.

click on the picture for sound

The role of the iterations is no longer textural. As they increase in amplitude they lead towards termination or a new onset. Their alignment serves not only to demonstrate their structural similarity, but also to increase the gestural direction. Their ultimate termination in the descending attack-decay archetype is strengthened by the careful alignment of this motive to the tempo of the iterations.

A second subsection of D is reminiscent of the slow textural build heard in section A. However, this motive is now combined with the sort of interrupting gesture heard in section A (0:55). Instead of being immediately followed by the concluding gesture, the gradual build starts again after the interruption, increasing the tension as the sectional termination is further postponed. Strong gestural activity terminates this build and acts as an onset to the return of the iterations, now in their new gestural role. The iterations move the listener to the climax of the work at 6:45, the strongest descending attack-decay gesture yet heard.

Section D, although containing previously heard material, is unprecedented in gestural activity. The direction towards termination never wavers as interruptions only serve to heighten the tension. Just as the interruption of the middle subsection at 5:30 serves to prolong the tension, the middle subsection itself acts as an interruption of the gestural iteration motive which dominates this section. The material presented in the opening of this work has been transformed into the primary engine of structural motion towards the work’s ultimate goal.

Section D - 4:37 to 6:57

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Introduction | Spectral Overview | Section A | Section B | Section C | Section D | Section E | Summary | Resources