前言近年来,作为磁带录膏对象的音乐信号源,动态范围不断扩大;为了使微型录音机座等的PCM(脉冲编码调制)系统具有代表性。在周边的音频机器方面,也正在出现动态范围扩大了的装置。这样,现在音乐用的广泛普及的微型盒式系统,也追求扩大动 Foreword In recent years, as a music signal source for tape recording paste, the dynamic range has been constantly expanding. In order to make a PCM (pulse code modulation) system such as a micro-recorder stand representative. In the surrounding audio equipment, there is also a dynamic range expansion device. In this way, miniature cassette systems, which are now widely used in music, are also seeking to expand their capabilities