许多因素会限制制作音频记录的性能；其中包括现场的噪声和混响；麦克风的位置、方向性和频率响应；麦克风前置放大器性能；还有很多其他的。本指南的目的是仅概述由液位控制设置控制的因素，这些因素会导致磁带上记录多少流量。背景部分列举了由于记录不足和记录过多而导致的一些问题，目标是尽可能最好的级别设置实践。规范部分给出了用vu计或准测量仪测量的对话峰值所用电平的建议- 峰值响应计。这些规范是根据不同录音条件、磁带类型等方面积累的经验制定的。本指南描述了两种制作对话录音的方法:（a）将制作混音器送入1/4英寸录音机时，或（b）将麦克风的音频直接送入1/4英寸制作录音机时。

Many factors can limit the performance of production audio recordings; among them are acoustical noise and reverberation on the set; placement, directionality, and frequency response of microphones; microphone preamplifier performance; and many others. The object of this guideline is to outline only those factors which are controlled by the setting of level controls which result in how much flux is recorded on the tape. A background section enumerates some of the problems resulting from under- and over-recording, with the objective being the best possible level-setting practice. A specification section gives recommendations for the levels to be used for the peaks of dialog as measured by vu meters or by quasi-peak-responding meters. The specifications were developed from accumulated experience with varying recording conditions, tape types, etc. The guideline describes two methods for production recording of dialog: (a) when a production mixer is fed to a 1/4-in recorder, or (b) when audio from microphones is fed directly into a 1/4-in production recorder.