基于频谱包络的钢琴乐音仿真模型构建

Construction of Piano Music Simulation Model Based on Spectrum Envelope

本文基于频谱包络构建并实现了钢琴乐音仿真模型,即以钢琴琴弦振动与共鸣箱相关作用为基础,基于频谱合成技术原理,就某段C大调乐谱相关参数输入,以加法合成技术为载体,实现了钢琴乐器乐音仿真。实验结果表明,基于分段包络函数与频谱包络建模的滤波器,修饰完善时域与频域后,钢琴乐音仿真既可促使乐音音符之间和谐衔接,又可强化部分信号音强,乐音视听效果起伏感较强,且始终保持有序,与真实钢琴乐音高度接近;此方法所合成乐音信号,高度接近真实钢琴音符理论值,准确率较高,说明此仿真方法具有有效性,且乐音仿真准确度较高。

Based on the spectral envelope,this paper builds a simulation model and implements the piano music,which on the basis of the piano string vibration and sound box related function,based on spectrum synthesis principle,related parameter input,in a period of C major music with additive synthesis technology as the carrier,it realizes the piano musical instrument sound,simulation experiment results show that the filter based on piecewise spectrum envelope function and modeling,modification time domain and frequency domain,the piano music harmonious connection between the simulation can make music notes,but also strengthen the part signal sound intensity,sound audio-visual effect and strong feeling,and always maintain orderly,and real piano music height near;The music signal synthesized by this method is highly close to the theoretical value of real piano notes with high accuracy,which indicates that the simulation method is effective and the music simulation accuracy is high.