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目前已有不少CD机用户购买解压板,将其CD机改为VCD兼容机。但在改装后会发现这样一个问题:放VCD时音质还可以,可放CD时音质有所下降。笔者就遇到了这样的问题,将解压板(无音频输出型)装上CD机后,放CD时常出现一个或两个声道伴随有“吱、吱”声。经过一段时间的反复测定后发现.主要是由于BCLK走线过长引入的干扰。
There are many CD machine users to buy decompression board, the CD player to VCD compatible machine. However, after the modification will find such a problem: when you can play VCD quality, CD quality can be reduced when dropped. I encountered such a problem, the decompression board (no audio output type) installed on the CD player, the CD often appear on one or two channels accompanied by “squeak, squeak” sound. After repeated measurements over a period of time was found mainly due to the introduction of BCLK trace length interference.