Mackie 1642-VLZ Pro Owner's Manual Glossary - Page 13
slide control.
View all Mackie 1642-VLZ Pro manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 13 highlights
tude but are opposite in polarity. The two legs of a differential output are 180 degrees out of phase. The phase reverse switch found on some mixers or mic preamps actually reverses the signal polarity. When out-of-phase signals are mixed, there will be some cancellation at certain frequencies, the frequencies and the degree of cancellation being a function of the amount of phase shift and the relative amplitude of the signals. Attention to mic placement and careful listening will allow you to use this effect creatively. phasing A dynamic effect in which the phase relationship between the fundamental and overtone components of a sound is continually changing. This is done by passing the signal through an automatically sweeping filter. The effect is often simulated by mixing original signal with a delayed (1 to 10 ms) version of itself. The time of the delay is slowly varied, and the combination of the two signals results in a dramatic moving comb-filter effect. A comb filter can be found in your back pocket. phone jack Ever see those old telephone switchboards with hundreds of jacks and patch cords and plugs? Or the plug on the end of a headphone cable? Those are phone jacks and plugs, now used widely with musical instruments and audio equipment. A phone jack is the female connector, and we use them in 1/4" two-conductor (TS) and three-conductor (TRS) versions. post-fader A term used to describe an aux send (or other output) that is connected so that it is affected by the setting of the associated channel fader. Sends connected this way are typically (but not always) used for effects. A post-fader output from a mixer channel usually is also post-EQ. If pain persists, see your mixer's block diagram. Also see pre-fader. pot, potentiometer In electronics, a variable resistor that varies the potential, or voltage. In audio, any rotary or slide control. pre-fader A term used to describe an aux send (or other output) that is connected so that it is not affected by the setting of the associated channel fader. Sends connected this way are typically (but not always) used for monitors (foldback). See post-fader. proximity effect The property of many directional microphones to accentuate their bass response when the source-to-mic distance is small, typically three inches or less. Singers generally like this effect even more than singing in the shower. Q phone plug The male counterpart to the phone jack, right above. phono jack Short for RCA phono jack. phono plug Short for RCA phono plug. Q A way of stating the bandwidth of a filter or equalizer section. An EQ with a Q of .75 is broad and smooth, while a Q of 10 gives a narrow, pointed response curve. To calculate the value of Q, you must know the center frequency of the EQ section and the frequencies at which the upper and lower skirts fall 3 dB below the level of the center frequency. Q equals the center frequency divided by the difference between the upper and lower 3 dBdown frequencies. A peaking EQ centered at 10 13