论文部分内容阅读
为平衡音乐的音量动态范围,专业扩音或录音放大器都设有音量压缩电路,以适应音响器材的动态范围。在音乐录音过程中,经过慎密的压缩处理,可以适当提升音量极小时的低电平,同时改善其信噪比,对音乐高潮适当压缩以适应录音载体的动态范围。各种录音载体都有额定的动态范围,信号电平过低,会降低信噪比;信号电平过高,在磁性录音时会使偏磁电流相对过小,产生削波失真,即使光盘录音,也会受到激光束强度动态范围的限制。因此,录音软件都无一例外地经过压缩处理。
To balance the dynamic volume of music volume, professional amplifiers or recording amplifiers are equipped with volume compression circuit to meet the dynamic range of audio equipment. In the process of music recording, after careful compression processing, you can properly raise the low volume at a very low level, while improving its signal to noise ratio, the appropriate orgasm compression to adapt to the dynamic range of the recording carrier. Various recording carriers have a rated dynamic range, the signal level is too low, will reduce the signal-to-noise ratio; signal level is too high, the magnetic recording will make the bias current is too small, resulting in clipping distortion, even disc recording , Is also limited by the dynamic range of laser beam intensity. Therefore, the recording software is compressed without exception.