Note: it is essential that the mute switches are momentary in this case, they cannot be latching switches. Otherwise, fan the logic signal out to all of the logic inputs on the Mute block. If you're using a ganged Mute block (with a "G" in the corner), then connect the OR gate to the single logic input on the Mute block. To accomplish this, an OR gate is used to combine all of the logic signals into one signal. Then, the output of the OR gate is connected to the Flip Flop and Mute block, and optionally connected to Logic Outputs if LEDs are being utilized. This is useful if you don't need independent control over the mute state of individual microphones, but want a convenient place to mute/unmute all of the room's microphones. In this example, the desired behavior is as follows: when any mute switch is pressed, it mutes/unmutes all microphones at the same time. This logic output can also be used to display mute state with LEDs: Tesira release 3.13 and later allow logic outputs on mute blocks. red when they should be green, green when they should be red), then enable the Invert button in the Logic Output block for all of the LED logic outputs. If the LEDs are working opposite to the way you want (i.e. This will ensure that only one LED color is on at any one time. The Logic Output connected to the green LED will also be connected to the same signal that is connected to the Mute block, but only after that signal is put through a NOT gate. In this case, the Logic Output connected to the red LED will be connected to the same signal that is connected to the Mute block. Programming this behavior requires a little more sophistication. If a microphone has two LEDs (most often red and green), then usually the green LED is on when the mic is unmuted, and the red LED is on when the mic is muted. on when they should be off, off when they should be on), then enable the Invert button in the Logic Output block. To control the LED, simply take the same logic signal that is connected to the Mute block, and also connect it to the Logic Output. If the LEDs are working opposite to the way you want (i.e. If a microphone has a single-LED, it is usually turned on when the mic is muted, and turned off when it is unmuted (although it can be configured to work in the opposite way as well). LEDs are generally connected to Logic Outputs on an EX-LOGIC or the GPIO port of a server or TesiraFORTÉ. Some microphones feature one or more LEDs to indicate the current mute state. So, if you are working with normally-open switches, you'll usually need to either put the logic signal through a NOT gate, or just enable the Invert button in the Logic Input block. Tesira logic blocks usually work best with normally-low logic signals. Therefore, normally-closed mute switches create normally-low logic signals, and normally-open mute switches create normally-high logic signals. On a Tesira logic input, a short circuit will create a low logic signal (i.e., off), and an open circuit will create a high logic signal (i.e., on). When connecting these mute switches to a Tesira system, it is important to know whether the switch is normally-open or normally-closed. Mic mute switches can be normally-closed (meaning that they normally create a short circuit, and then create an open circuit when the mute switch is pressed) or normally-open (meaning that they normally create an open circuit, and then create a short circuit when the mute switch is pressed).
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