模拟电吉他效果器与数字电吉他效果器对比实验

Experiment of Comparison Between Analog & Digital Guitar Effect

分析了电吉他效果器发展至今延伸出模拟与数字两种规格的产品原理和特点。继而论述了不同原理的设备在效果上的异同,并提出了量化分析这种异同的设想,对实际运用的选择以作参考。Roland公司旗下有名为Boss的模拟效果器系列,并有对应的数字综合效果器系列。因此,可借此为分析对象,控制变量,设计了实验:生产由相同吉他信号通过其产生的不同音色样本,并对样本进行包络、频谱等研究,分析其音色属性。最后搭建了系统完成了实验,得到了相关的数据。最终,经分析数据得出:OD-1相比ME-25灵敏度更低;高次谐波上激励更强,音色更为明亮;产生的高频噪声成分更单纯,声音更干净;对于电吉他的琴体振动反应更为敏锐,产生的噪声更为复杂。

The principle and specifications of electric guitar effects which had developed so far extended as the product of two kinds of analog and digital ones are analyzed. It discusses the similarities and differences between equipment of different principles in effect. And the idea that should be analyzed through the methods of quantitative analysis in order to come up with the application of choice for reference. There are famous series of analog guitar effects named Boss, and also series of digital ones opposite which belong to Roland. Take this as the analysis object, control variables, and design the experiment as below：The samples produced by the same guitar signal could show the critical differences in passing different kinds of effects, and would also show their envelope and frequency spectrum for analysis of the timbre attribute. Finally, the system was built up. We obtained the relevant data. By analyzing the data obtained ： OD - 1 has lower sensitivity than ME - 25, but whose High order harmonic get harder excitation so that sounds brighter as usual. At the same time high - frequency noise is generated more simple,as sounds clean. OD - 1 seems also more sharper for guitar body vibration.