《Elevator Music Generator》生成式音樂創作計畫

紀柏豪

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紀柏豪「《Elevator Music Generator》生成式音樂創作計畫」簡介

隨著創意科技的發展，創造音樂的途徑或說作曲的方法，除了把腦中旋律寫成樂譜外，還能經由電腦輔助隨機性及演算法來實現。「作曲」不再只是構思音樂本身，也包含設計出「能製造音樂的系統」。牛津英語辭典中，對於「系統」的定義，為「有規律的框架或方法」，一整組單元會依照被設計好的原則或步驟依序運行。

「《Elevator Music Generator》生成式音樂創作計畫」透過Max／MSP程式設計為基礎，延續當代作曲家如Steve Reich與Brian Eno等人的實驗，應用數位工具來創造生成式曲目。線上廣播（Online radio）的可存檔和按需回放功能，改變了過往聽眾收聽廣播節目時，與一段聲音、想法、對話相遇的不可重複性。Muzak（電梯音樂）現在被用來泛指那些背景的、功能性的樂段組合。本計劃將上述兩種概念結合，創造以「軟體」形式存在的音樂作品，包含自動運行的音序器與通過關鍵字去搜尋網路聲音素材的爬蟲程式，並依每日時段變化自動調整參數。在將演算法、聲音素材編排完成並讀取後，系統就將獨立運作下去，在預設規則下永不重複地再現，產生相似卻又不完全相同的樂段。

備註：從每週第一天（週日）起，每天依序是Ionian（Major Scale）、Dorian、Phrygian、Lydian、Mixolydian、Aeolian（Natural minor）、Locrian音階。而每日不同時間的變化，則是從0點開始，則是依序從五度圈的0點位置C為根音開始，1點根音為C#/Db、2點根音為D、3點根音為D#/Eb……以此類推。例如，在禮拜一的4點區間（4-5點），生成示音樂系統會出現的音高，即來自於根音為E的Dorian音階。以凌晨0點與中午12點為轉折點，音樂速度會由0點開始逐漸加速（由60BPM開始加速），到中午12點（速度最快為120BPM）後開始逐漸降速，每日往返。

英文簡介

With the development of creative technologies, music-making, or so-called composing, computer-assisted randomness and algorithm can be achieved instead of writing melodies out of one's head. "Composing" is no longer just about conceiving the music itself, but also about designing a "system that makes music." The Oxford English Dictionary defines a "system" as "a regular framework or method" in which a set of units follows a sequence of designed principles or steps.

"Elevator Music Generator" is a generative music project based on Max/MSP programming. It continues the experiments of contemporary composers such as Steve Reich and Brian Eno, using digital tools to create evolving content. With its archival and on-demand playback capabilities, online radio had changed the unrepeatable moment listeners used to meet a voice, a thought, a discussion when they listened to a radio program. "Muzak" is often used as a term for most background music forms, regardless of the music source, and may also be known as "elevator music." This project combines both of the concepts above, creating musical pieces in the form of "software." The system consists of an auto-sequencer and a crawler program that searches audio files on the web with given keywords while adjusting its parameters automatically over time. Once started, the system will continue to operate independently, never repeating itself under preset rules, producing similar but not identical transitions.

Note: From the first day of each week (Sunday), the daily order is Ionian (Major Scale), Dorian, Phrygian, Lydian, Mixolydian, Aeolian (Natural minor), and Locrian scales. The daily changes at different times of the day start from 0:00, then the root note is C at 0:00 of the circle of fifths, C#/Db at 1:00, D at 2:00, D#/Eb at 3:00, and so on. For example, in the 4 o'clock interval (4-5 o'clock) on Monday, the pitch that will appear in the music system is the Dorian scale with the root note E. At 0:00 am and 12:00 noon, the music's speed gradually accelerates from 0:00 am (from 60 BPM) to noon (the fastest speed is 120 BPM), and then gradually decreases from there.

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