Table of Contents

Output Functions

To configure output functions, in the project tree, select <Device>/<Audio>/Output Functions.

Output functions are universally applicable DSP functions for switching, level changing, talkback and summation applications. Often, these are used directly before an audio signal output. This is where the name comes from: output function.

Every output function has two audio inputs, Source 1 and Source 2. These inputs are summed. You can influence them by two corresponding level values. The special thing about this is the following: Both, the sources of the input signals as well as their levels can be changed according to logic conditions. The output signal of an output function itself is available as an audio source on the TDM bus. Using this method, the most different applications can be realised.

In the following figure, in the Edit Output Function area, you see an example of a configured output function:

Output functions, selecting audio sources.

The following signals can be used as input signals (Source 1 and Source 2) for output functions:

An output function can have the preset logic condition Default and up to 9 further logic conditions. Each of them is shown in the list in the Edit Output Function area. Each of them is shown as a row in that list. There you can assign other input signals and level values.

The logic condition Default is always in the top line and always active if none of the configured conditions below is active (logically true).

As logic conditions in the Condition column you can use all logic sources that are available in the Logic Sources window.

The priority of the logic conditions decreases from top to bottom. So a condition is only used if all conditions above it are inactive.

For the example in the figure, this means (viewed from bottom to top):

If no other logic condition is programmed, always the first line Default is active.

Output functions are mono at the inputs and at the outputs. So for stereo signals, the left and the right channels have to be programmed separately!

To create a new output function, click Add. To delete a selected output function, click Remove. You can also right-click in the Output Function list to add or remove an output function.

Edit Output Functions

In the Edit Output Functions area, you can configure the output function which is selected in the Output Functions list.

To configure a created output function, follow these steps:

1. Enter a distinctive name for the output function in the Label box. Please note that the name should be comprehensive because up to 120 output functions can be available per device.

2. Click Add to insert a new condition row. Now select the new condition row. Definiton fields (Condition, Source, Potentiometer and Level) are now displayed. For first row, condition is always default and therefore not clickable.

3. Click Condition to open the Logic Sources window.

4. In the Logic Sources window, select the desired logic source and click Assign. Alternatively, you can double-click on the logic source or drag it to the Condition column of the list. The first row of the list always contains the condition Default and can not be changed.

5. Assign the first audio sources to the selected condition row. To do this, click Select in the Source 1 Section to open the Audio Sources window.

6. In the Audio Sources window, select the desired audio source, click Assign.

7. Adjust the level using the potentiometer in the Source 1 Section. To change a level, click and hold the potentiometer button. If you move the cursor to the left or the right holding the mouse button, you can change the level. Alternatively, you can click on the button, hold the mouse button and change the value using the following keys:

+1 dB stepsright arrow key or up arrow key
-1 dB stepsleft arrow key or down arrow key
OffPos 1
+20 dBEnd
+5% steps (+6 dB)Page up
-5% steps (-6 dB)Page down

7. To rotate the phase position of the selected audio source by 180 degrees, select the Phase Reverse check box.

8. Select a potentiometer, the level value of which becomes valid in addition to the level value already configured. For example, if you have set the level of the audio source to -3 dB, and the selected potentiometer is set to -15 dB, in total, the signal is attenuated to $-15 dB + (-3 dB) = -18 dB$. Select the desired potentiometer or select (none) if you do not want to use a potentiometer. (See also Potentiometer – Assigning Potentiometers)

9. To assign a second audio sources to the selected condition row, do the same in Source 2 section.

To configure the output functions, please note the following hints:

Output Function priority | Minimum Toolbox v9.0.4 & FW 9.0.2

By using low priority output functions you can raise the maximum of 120 output functions to a maximum of 240.

Note
License 52-8581 Enhanced DSP Processing and a device capable of 120 high priority output functions (see Functional Range of the XC2/XD2/XS2 Core Devices with Firmware 9.0) required.

Note
Minimum Toolbox v9.0.4 & FW 9.0.2 required.

High priority output functions continue to be the default output functions for time critical applications.

Low priority output functions can beused to save processing capacity and allow to have more output functions. Low priority output functions work in the same way as high priority output functions but are processed slower. This means that latency between triggering a condition and switching sources can be significantly higher but could be useful for many non-time critical applications such as routing lines or selecting monitor sources.

For example: if you want to mute your monitor speakers when a microphone channel is open you should use high priority output functions as the low priority output functions could cause a short audio feedback before the monitor speakers are muted.

Each low priority function allows to have another low priority function. If you only use low priority output functions you can have up to 240. If you only use high priority output functions you can have up to 120 output functions. (Ratio 1:2)
For example: if you have 60 high priority output functions, you can have 120 low priority output functions. That is a total of 180 output functions.