一、立体声唱片简史及制式对于双声道立体声唱片的研究,早在三十年代初就开始了,当时英国哥仑比亚公司的布勒姆莱因(Blumlein)提出了两种录制方法:(1)一个声道象单声道唱片一样作横向刻录,而另一声道作纵向刻录.(2)两个声道分别垂直于唱片的左、右音槽壁进行刻录.前者称V/L制式,后者称45/45制式(一般地说,唱片音 A Brief History of Stereo Recordings and Formats The study of two-channel stereo recording began as early as the early 1930s when Blumlein of Columbia, England, proposed two recording methods: (1) One track is recorded horizontally like mono record, while the other track is recorded vertically. (2) The two tracks are recorded perpendicular to the left and right slot walls of the record, respectively.The former is called V / L standard, the latter said 45/45 standard (in general, the recording sound