Spectromorphology of Saariaho's Serenatas (Misterioso)

In this study, I interpreted the Misterioso movement of Serenatas through a single timbral map (focused on spectromorphology). From the beginning, my intention was to hear the piece not as a “melody-harmony narrative,” but through spectral focus and shaping in time (morphology). This approach was built around the idea of local energy clusters (what Smalley calls spectral focus/formant) gathering at the center and then expanding and thinning outwards; in this layout, the central band represents the “center of gravity,” while the surrounding rings show the cycles of accumulation→release. Smalley’s spectromorphology brings two simple questions together: What is heard? (Spectrum—harmonic/inharmonic/noise, bandwidth, density, focus) and How does it flow? (Morphology—onset/attack, continuant, termination/release). In my perception, Misterioso functions like a “timbral breath” that repeatedly concentrates at the center and then spreads towards the peripheries. This breath is clarified by Smalley’s motion/growth processes: Intensification / Relaxation (energy rises and eases), Accumulation / Dispersion (gathering ↔ scattering), Expansion / Contraction (bandwidth opens and closes), Convergence / Divergence (layers approach/move away from the center), Ascent / Descent (spectral rise/fall), Acceleration / Deceleration (the temporal fabric tightens and loosens), and occasionally Dissipation (the fading of energy as if evaporating). While listening, the axis that carried me the most was Gesture–Texture. At certain moments, short, distinct attacks (the type Smalley calls attack-impulse) emerge; for me, these often register as “catalyzing” gestures, like the piano’s brief entries in the low register or percussive triggers. Immediately following these attacks, what we call graduated continuants—timbral bands that have value in their continuity and “breathe” with small internal changes—come into play. This flow sometimes shifts into texture: Iterative (fast, repetitive surfaces), Granular (grainy/cloud-like clusters), Stream (simultaneous layers/flows), Mass/Cloud (dense swarms), and Turbulence (irregular agitation). In a single sentence: an attack ignites, the texture sustains the burn. The reason I hear the piece as “matter accumulating at the center” is the re-emergence of local energy clusters (formants) that leak energy to their surroundings. Viewed this way, the form operates not like a classic “theme-variation” but more with a sense of space-form: near/far, front/back, narrow/wide. The moments we rediscover the center create a centripetal (inward-pulling) feeling, while the moments we spread outwards create a centrifugal (outward-scattering) one. When I heard occasional tonal/linear traces in the work, I interpreted this not as a “return to harmony,” but as the alignment of layers at the center (convergence) and the sharpening of the spectral focus. Particularly, the entries coming and going from the low register (attack→decay character) worked for me like thresholds framing time; the subsequent continuant bands kept the formant center visible for a while longer. Thus, what I call a “tonal trace” found its place as a moment of spectral clarity—meaningful within the timbral form.