64个独立拾音器实现吉他弦的高精度多点采样
PolyMap: A 64-Channel Polyphonic Guitar Pickup System
- 每根弦配置8个拾音器，共64个，实现多点独立采集
- 信号在琴内数字化并通过MADI接口低延迟传输
- 支持音乐人、工程师和研究者进行深度音频处理
在电吉他中，琴弦振动通常由带有磁铁的线圈拾音器感应。拾音器及其沿琴弦的位置对乐器音色有显著影响。大多数吉他配备1到3个拾音器，每个覆盖所有琴弦，位置固定，输出单声道信号。本文在苏黎世联邦理工学院完成的硕士论文提出了一种名为PolyMap的新拾音系统，可对每根琴弦进行独立且多位置的感应。系统通过定制的八弦吉他实现，每根弦配备8个拾音器，总计64个拾音器。这些拾音器的信号在吉他内部独立数字化，并通过多通道数字音频接口（MADI）——一种低延迟数字音频接口——传输至计算机进行后续处理。PolyMap实现了电吉他琴弦的高分辨率传感，为音乐人、音频工程师和研究人员提供了广泛的后期处理能力。据我们所知，这是首个具备如此完整功能集的多声部吉他拾音系统。
原文摘要 · Abstract (English)
In electric guitars, the vibrations of the strings are typically sensed by coils of wire combined with a magnet, called pickups. The pickups and their position along the strings contribute strongly to the instrument's sound. Most guitars feature one to three pickups, each spanning across all strings with fixed positions and generating a single mono output. The work of this Master's Thesis at ETH Zürich introduces a new pickup system called PolyMap, which senses each string individually and at multiple locations. The system is demonstrated with a custom-made eight-string guitar that contains eight pickups per string for a total of 64 pickups. The signals from these 64 pickups are individually digitized inside the guitar and transmitted over a multichannel audio digital interface (MADI), a low-latency digital audio interface, to a computer for further processing. PolyMap enables high-resolution sensing of an electric guitar's strings and enables extensive post-processing capabilities for musicians, audio engineers, and researchers. To the best of our knowledge, this is the first polyphonic guitar pickup system with such a complete feature set.
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