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| A good mixing board actually has three places to set levels, each with their own purposes and characteristics. The level of the sound that comes out is indicated by a row of LEDs that light up to indicate how high the outgoing sound levels are. Since you may have two, four, or eight channels going out, you would have one row of LEDs for each output channel. But to get these output levels right, you must properly set the "trim knob," the "input fader" or "pot" and the output "fader." |
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| The first of level control on a mixer is the trim knob. It determines how "hot" the sound signal will come into the rest of the mixing board. Ideally every other control will spend most of their time at their neutral settings and you will get them in their working range with the trim knob. It is usually located at the top of each channel's section near the input plugs. |
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| A "fader" is a sliding control that raises the sound volume when pushed up and lowers it when pushed down. "Pot" is short for potentiometer and both can increase or decrease the level from the neutral position. These should spend most of their time at the neutral position because that is where they produce the cleanest sound. On a Mackie mixer, this will be a "U" for "unity" which means the neutral signal. The input faders are located at the bottom of each input channel's section. |
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| You should have one output fader for each bus or output. If you are using the Alternate outs on a Mackie, you will not have output faders for those channels unless you route them through your main outputs. But if you are mixing several inputs together, and need to make the whole "mix" louder or softer, you can do that with the output faders. They are the final determinant of how much sound comes out, and changing them will change the levels shown on the LED scales. |
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