基于虚拟现实的三角钢琴键盘模拟系统设计

Design of Triangle Piano Keyboard Simulation System Based on Virtual Reality

针对传统三角钢琴乐器的音色、音符仿真效果不佳的问题,以三角钢琴键盘为研究对象,设计一个基于虚拟现实的三角钢琴键盘模拟系统。根据三角钢琴键盘的音高特性,获取钢琴弦振动方程和钢琴弦振动的泛音特性;然后分别对钢琴演奏频谱、包络特性和钢琴的共鸣系统进行具体分析;之后通过MATLAB仿真平台构建一个数字化的钢琴乐音键盘模拟系统。该系统主要分为激励系统和共鸣系统,基于加法合成技术和正弦波,分别采用频谱包络和滤波器修饰钢琴乐音,完善钢琴弹奏音色。仿真实验发现,提出的模拟系统能够增强三角钢琴弹奏乐音各音符的衔接度、和谐度,通过设计的仿真系统可对真实钢琴乐音进行精准模拟,提高了音色、音符仿真效果。

In view of the poor simulation effect of the timbre and notes of traditional grand piano instruments, a grand piano keyboard simulation system based on virtual reality is designed. According to the pitch characteristics of the grand piano keyboard, then analyze the piano performance spectrum, envelope characteristics and piano resonance system respectively, and then build a digital piano music keyboard simulation system through the MATLAB simulation platform. The system is mainly divided into excitation system and resonance system. Based on the additive synthesis technology and sine wave, the spectrum envelope and filter are used respectively to modify the piano music and improve the piano playing tone. The simulation experiment found that the proposed simulation system can enhance the cohesion and harmony of each note of the grand piano music. Through the designed simulation system can accurately simulate the real piano music, and improve the simulation effect of the tone and notes.