非接觸式磁力回饋音樂介面實作與探討

Abstract

本研究為以創意的出發點發展的獨特性數位科技樂器，基於Linux作業系統的嵌入式裝置經由Firmata協定整合Arduino實作磁力回饋新介面，並探討及分析表演者對於科技樂器的使用體驗。主要架構為在Raspberry Pi執行Pure Data當做音源，USB連接Arduino MEGA開發板，並將Arduino所讀取到的Sensor Aanlog Input訊號透過Firmata傳給 Pure Data。介面部分主要使用霍爾效應感應器（Hall-Effect Sensor）及環形磁鐵來設計，以手指戴上強力磁鐵從控制介面得到磁場的反饋力並達到線性的操作的表現，另外加入其他較為精準的控制方法來操作音源中重要參數。成品整合硬體及軟體使用，為一個不須透過電腦的獨立樂器。 論文架構第一章節為研究動機即目的。第二章節為文獻探討，搜集各式電子樂器以及各式感測器的比較。第三節為本研究系統之架構第四章節為系統設計實作。第五章節為對本研究做問卷的調查及統整，第六章總結進而提出未來發展和改善方向。

The digital musical instrument of touchless magnetic-feedback is based on Linux system and ADC evaluation board with Firmata protocol. This essay analyzes the user experience about digital musical instrument. The main framework is through Raspberry Pi and Arduino MEGA. In that, Raspberry Pi is running Pure Data as audio processing core and Arduino is reading analog sensors data to send Pure Data through Firmata protocol. In the section of control interface, it was designed by Hall-Effect sensor and annular magnetic. The wearable magnetic ring from which to get feedback allows the operation of linear performance. Hardware control and audio software core were integrated in the instrument. It is a unique new interface even without using computer (PC or Laptop).