Focusrite Green 5 Channel Strip, Руководство пользователя

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f u n c t i o n s
11
Setting the Gain
Depending on the input you are using, you use either the Mic rotary control or the
Input Trim rotary control to set the gain:
Input Rotary control
Mic Mic
Inst or Line Input Trim
Use the meter and the correct rotary control to match the incoming level and gain to
the internal operating level. With an input signal coming into the channel, watch the
meter as you use the rotary control to modify the gain, and set the control so that the
meter registers between -3 VU and 0 VU. This sets the level above the noise level of
the unit, and leaves room for any sudden increase in performance level (it gives about
20dB of usable headroom).
Note that when using the Mic rotary control, the Input Trim is not disabled, since you
could use it to make fine adjustments if required. However, you normally switch off
the Input Trim when using the Mic rotary control.
Off position: To switch off the Input Trim (for example, when using the mic input), set
the control in its centre (click) position. To switch off the Mic rotary control, click it to
the LINE position.
Setting the Phase
When recording a single source using more than one signal, it is possible for the
signals to be out of phase, which affects the quality of the recording by sounding “thin”.
For example, when recording a snare drum with two microphones (one on the top of
the snare, the other on the bottom) they will be out of phase. Use the phase switch to
reverse the phase on one of the microphones (but not both) – it normally doesn’t
matter which microphone you reverse. However, if the source is being picked up by
another microphone (for example, by an ambient microphone) then you need to
ensure that you do not put your two close microphones out of phase with the ambient
microphone.
If you think two signals are out of phase, listen for phase as follows:
1. On your monitor system, pan one signal to the left and the other to the right.
2. Use the phase switch to reverse the phase on one of the signals. When the two
signals are in phase, the signal sounds bigger.