4系统增益控制和设备增益预置功能为使系统设备配接更加合理,操作更加方便,系统的各级设备提供了众多的增益可调功能,如图1所示,这些功能需要正确地控制和预置。笔者将这些增益功能分为“系统增益控制”和“设备增益预置”功能两类。4.1调音台 4 System Gain Control and Equipment Gain Preset Function To make the system equipment more reasonable and easier to operate, various levels of equipment in the system provide many gain adjustable functions. As shown in Figure 1, these functions need to be properly controlled and Preset. The author will be divided into these gain functions “system gain control ” and “device gain preset ” function two categories. 4.1 mixer