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Turn the knob clockwise to increase the compression. Avoid setting the value too high, as too much compression may lead to howling. For more information about the compressors, see pages 18 and 21. Using the Compressors to Enhance Vocals (EMX512SC and EMX312SC only) 1 BASIC EMX512SC/EMX312SC/EMX212S 13 Making the Most of Your Mixer An Introduction You’ve got yourself a mixer and now you’re ready to use it. Just plug everything in, twiddle the controls, and away you go … right? Well, if you’ve done this before you won’t have any problems, but if this is the first time you’ve ever used a mixer you might want to read through this little tutorial and pick up a few basics that will help you get better performance and make better mixes. A Place for Everything and Everything in its Place A Plethora of Connectors—What Goes Where? Questions you’re likely to encounter when setting up a system for the first time might include “Why all these different types of connectors on the back of my mixer?” and “What’s the difference?”. Let’s start by taking a look at the most common connector types. The Venerable RCA Pin Jack This is the “consumer connector,” and the one that has been most commonly used on home audio gear for many years. Also known as “phono” jacks (short for “phonogram”), but the term isn’t used much these days—besides, it’s too easily confusable with “phone” jacks, below. RCA pin jacks are always unbalanced, and generally carry a line-level signal at –10 dB, nominal. You’re most likely to use this type of connector when connecting a CD player or other home audio type source to your mixer, or when connecting the output of your mixer to a cassette recorder or similar gear. The Versatile Phone Jack The name “phone jack” arose simply because this configuration was first used in telephone switchboards. Phone jacks can be tricky because you can’t always tell what type of signal they’re designed to handle just by looking at them. It could be unbalanced mono, unbalanced stereo, balanced mono, or an insert patch point. The connector’s label will usually tell you what type of signal it handles, as will the owner’s manual (you do keep your manuals in a safe place, don’t you?). A phone jack that is set up to handle balanced signals is also often referred to as a “TRS” phone jack. “TRS” stands for Tip- Ring-Sleeve, which describes the configuration of the phone plug used. The Sturdy XLR This type of connector is generally referred to as “XLRtype,” and almost always carries a balanced signal. If the corresponding circuitry is designed properly, however, XLRWhite Red Stereo/TRS phone plug Mono phone plug Male Female Making the Most of Your Mixer Making the Most of Your Mixer Use balanced lines. Short line-level runs: Unbalanced lines are fine if you’re in a relatively noise-free environment. Long line-level runs: The ambient electromagnetic noise level will be the ultimate deciding factor, but balanced is best. 14 BASIC type connectors will also handle unbalanced signals with no problem. Microphone cables usually have this type of connector, as do the inputs and outputs of most professional audio gear. Balanced, Unbalanced—What’s the Difference? In a word: “noise.” The whole point of balanced lines is noise rejection, and it’s something they’re very good at. Any length of wire will act as an antenna to pick up the random electromagnetic radiation we’re constantly surrounded by: radio and TV signals as well as spurious electromagnetic noise generated by power lines, motors, electric appliances, computer monitors, and a variety of other sources. The longer the wire, the more noise it is likely to pick up. That’s why balanced lines are the best choice for long cable runs. If your “studio” is basically confined to your desktop and all connections are no more than a meter or two in length, then unbalanced lines are fine—unless you’re surrounded by extremely high levels of electromagnetic noise. Another place balanced lines are almost always used is in microphone cables. The reason for this is that the output signal from most microphones is very small, so even a tiny amount of noise will be relatively large, and will be amplified to an alarming To summarize EMX512SC/EMX312SC/EMX212S Balanced noise cancellation Noise Hot (+) Cold (–) Ground Source Cable Noise cancelled Noise-free signal Phase inversion Receiving device degree in the mixer’s high-gain head amplifier. How Do Balanced Lines Reject Noise? ** Skip this section if technical details make you queasy. ** Balanced lines work on the principle of “phase cancellation”: if you add two identical signals out of phase (i.e. one signal is inverted so its peaks coincide with the troughs in the other signal), the result is … nothing. A flat line. The signals cancel each other out. A balanced cable has three conductors: 1) A ground conductor which carries no signal, just the “ground” or “0” reference against which the signal in the other conductors fluctuates. 2) A “hot” or “+” conducto...
Este manual também é adequado para os modelos :Instrumentos musicais - EMX212S (2.83 mb)
Instrumentos musicais - EMX512SC (2.83 mb)