The Magnetic Resonator Piano: Electronic Augmentation of an Acoustic Grand Piano
The Magnetic Resonator Piano: Electronic Augmentation of an Acoustic Grand Piano
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磁共振钢琴：原声三角钢琴的电子增强
DOI：
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发表时间：
2010
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通讯作者：
Andrew Mcpherson
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文献类型：
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作者：
Andrew Mcpherson
摘要 本文介绍了磁共振钢琴，一种扩展传统三角钢琴的混合声学电子乐器。声音是在没有扬声器的情况下产生的，使用电磁执行器直接操纵钢琴弦，将其词汇扩展到包括无限延音、从静音、和声和各种音色中渐强的音符。基于反馈的方法通过音板上的单个拾音器感测琴弦振动，使用滤波器和锁相环生成增强每根琴弦自然运动的信号。信号路由硬件可以使用标准数字音频接口覆盖钢琴的所有 88 个音符。本文描述了仪器的硬件、软件和执行接口，并介绍了幅度、频率响应和锁相环性能的测量。执行器产生的声音达到与传统钢琴相似的振幅，虽然它们无法复制钢琴音锤产生的快速起音，但它们通过实现对振幅、频率和音色的连续连奏控制来补充钢琴的敲击特性。
Abstract This paper presents the magnetic resonator piano, a hybrid acoustic-electronic instrument extending the traditional grand piano. Sound is produced without loudspeakers using electromagnetic actuators to directly manipulate the piano strings, expanding its vocabulary to include infinite sustain, notes that crescendo from silence, harmonics, and a variety of timbres. A feedback-based approach senses string vibrations from a single pickup on the soundboard, using filters and phase-locked loops to generate signals which reinforce the natural motion of each string. Signal-routing hardware enables coverage of all 88 notes of the piano using a standard digital audio interface. This paper describes the hardware, software, and performing interface of the instrument and presents measurements of amplitude, frequency response, and phase-locked loop performance. Sounds generated by the actuators achieve similar amplitudes to the traditional piano, and while they cannot replicate the rapid attack produced by a piano hammer, they complement the percussive nature of the piano by enabling continuous legato control of amplitude, frequency, and timbre.