Rubble (2025) - Pitch Sets (demo)

The first half of Rubble follows a structured form, incorporating a digital score that presents 23 rotating pitch sets in real-time using action notation. The performer reads these ordered pitch sets (0:00 - 5:30), using bowed and plucked overtones to represent the textures of moss and rock, respectively. Improvisatory interludes also emerge in response to magnified elements of the composer photograph in the digital score. These close-ups appear within the rotating pitch set structure, and encourage an intuitive link back to the initial tactile experience.In performance, the pitch sets are accompanied by an audio backing track, featuring a previous recording of the same pitch sets. *Please note: the audio heard in this pitch-set video is not the backing track. It is included only a demo to guide the overtone material. The backing track is uploaded as a seperate file in the collection The earth remembers in grains. Each pitch set comprises a different grouping of overtones or open strings, each of which have emerged as a result of the plastibass preparations. These configurations were then ordered and notated into a specific structure for performance in the first half. The pitch sets are presented on an iPad, which the performer reads but does not share with the audience, using the same format as engaged in Ice Bubbles (2023). Pitch set parameters:The four strings of the double bass are arranged vertically in the score image frame: from lowest (E string - left) to highest (G string - right). The recommended scordatura is Eb-A-D-F, creating subtle tonal variation to emphasise timbre rather than prescribed pitch output. Partial numbers appear inside the coloured shapes, indicating nodal string placement. Orange arrows indicate a plucked harmonic with the right-hand, and green arrows indicate a plucked harmonic with the left-hand (using a fingerpick). They also indicate the direction in which to pluck or strum these sounds. Black arrows indicate an ordinary tone. Highlighted orange strings represent open strings, to be plucked with the right hand. The performer improvises with each pitch set in performance, ensuring that all notes within each grouping are sounded at least once before the next appears in the digital score. A backing audio track guides the pacing of these pitch sets through following the same structure.  -------Please note: this video score includes audio as a demo to connect the pitch sets with resulting overtone material. In performance, the score is played alongside a backing track, which is not included in this file. Score Programming: Helen Svoboda

《碎石》（Rubble）的上半场采用结构化创作形式，融入了一套数字乐谱，该乐谱以动作记谱法（action notation）实时呈现23组循环轮换的音高集合。演奏者需依次演奏这些有序音高集合（0:00 - 5:30），分别用弓奏泛音与拨奏泛音来模拟苔藓与岩石的肌理质感。数字乐谱中还会嵌入作曲家摄影作品的放大细节，由此衍生出即兴插段；这些特写画面嵌入循环音高集合的结构中，引导演奏者回溯至最初的触觉体验。

演出过程中，音高集合将搭配音频伴奏轨，该伴奏轨采用同一组音高集合的既往录音制作而成。*请注意：本音高集合演示视频中的音频并非伴奏轨，仅作为指导泛音演奏素材的演示内容使用。伴奏轨已作为独立文件上传至《颗粒状记忆》（The earth remembers in grains）作品集当中。

每组音高集合均由不同的泛音分组或空弦音组成，这些均源自特制塑料贝斯（plastibass）的调试改造。随后这些音色配置被整理编排为特定的演奏结构，用于上半场的演出。音高集合将通过iPad呈现，演奏者可查阅该乐谱，但不会向观众展示，其呈现格式与2023年作品《冰泡》（Ice Bubbles）所采用的格式一致。

音高集合参数说明：乐谱画面帧中，低音提琴（double bass）的四根琴弦呈垂直排列，从最低音（E弦——左侧）至最高音（G弦——右侧）。推荐采用降E-A-D-F的变调定弦（scordatura），以此营造细微的音色变化，突出音色质感而非固定音高输出。彩色形状内部标注的泛音序号，表示弦的节点位置。橙色箭头代表右手拨奏泛音，绿色箭头代表左手戴指套（fingerpick）拨奏泛音，同时箭头方向也指示了拨弦或扫弦的运动方向。黑色箭头代表普通演奏音。高亮显示的橙色琴弦为空弦音，需用右手拨奏。

演奏者在演出中需结合每组音高集合进行即兴演绎，确保每组音高集合内的所有音符至少被演奏一次，方可切换至数字乐谱中的下一组音高集合。音频伴奏轨将遵循相同的结构，引导各组音高集合的演奏节奏。
-------请注意：本视频乐谱附带的音频仅作为演示，用于关联音高集合与最终产生的泛音素材。演出时，乐谱将搭配伴奏轨演奏，该伴奏轨未包含在此文件中。
乐谱编程：海伦·斯沃博达（Helen Svoboda）