Yamaha QL5 Reference Manual - Page 123

5 METER switch buttons Switch the meter display. • GR Indicates the amount of gain reduction applied by the compressor. • +4/+8 Each meter uses -18 dB as the reference level of the output signal, and indicates "0VU" for the value of the reference level added by +4 dB or +8 dB. • OFF Turns off the meter display. 6 OUTPUT knob Adjusts the output level. If you have adjusted the amount of gain reduction by changing the INPUT knob, the level of audible volume will also change. In this case, use the OUTPUT knob to adjust the volume level. Graphic EQ, effects, and Premium Rack  Opt-2A Opt-2A is a processor that emulates a popular vintage model of tube optical compressors. It features smooth compression produced using optical components such as a CdS cell and an EL panel to control the level. It also features beautiful high-range overtones created by the warm distortion typical of tube circuits, resulting in elegant and sophisticated sounds. 1 2 34 1 GAIN knob Adjusts the output level. 2 PEAK REDUCTION knob Adjusts the compression amount of the signal. 3 RATIO knob Adjusts the compression ratio. 4 METER SELECT knob Switches the meter display. GAIN REDUCTION indicates the amount of gain reduction applied by the compressor. With -18 dB as the reference level of the output signal, the OUTPUT +10 and OUTPUT +4 settings respectively will cause the value +10 dB or +4 dB from this reference level to be shown as "0VU" on the meter. 123 Reference Manual