Fixed Processing

To create and configure fixed processings, select <Device>/Audio/Fixed Processing in the project tree.

Fixed processings are universally applicable, fixed DSP functions to route internal signals for example through limiters, compressors etc. In addition, sine generators can be configured.

You can use every audio signal available on the internal TDM bus as input for a fixed processing: inputs, delays, mixing functions (summing busses, groups, Aux busses), pre-fader signals (fader channel after input processing), clean feeds (n-1 busses), monitor functions, fixed processing, output functions, super output functions and talk outputs. The output of each fixed processing is available as an audio source in the Audio Sources window.

Fixed Processings are internally computed as stereo, but they also can be used mono.

Mixing devices contain a variety of DSP functions by default. Additional enhanced processings require an additional license code that has to be ordered separately.

Fixed Processing, configuration of a limiter.

The following DSP functions are available for fixed processing:

For special applications like sound processing for FM transmission you can configure special Enhanced DSP Functions. These functions are enabled using one license code per DSP frame:

To use the extended functions, you have to order the software license 52-8581 Enhanced DSP Fixed Processing. To be able to adjust the settings during the runtime, you also need the 52-8565 DSP Control Software, which has to be ordered additionally.

To create and configure a fixed processing, follow these steps:

1. To create a new fixed processing, in the Fixed Processings area, click Add.
2. To change the name for a selected fixed processing, in the Edit Fixed Processing area, enter name in the Label box. This label can be up to 16 digits long.
3. To select an audio source as input for the processing, click Select. The Audio Sources window opens.
4. In the Audio Sources window, select the desired audio source and click Assign. Alternatively, you can double-click on the audio source or drag it to the Source box.

   Note
   If you use a generator function for the fixed processing, you don't need to assign an audio source. If an audio source is assigned anyway, it will be ignored!

5. If you select the Stereo check box, the subsequent channel is selected automatically, in most cases the right channel of a stereo signal. Apart from this, the fixed processing is also shown as a stereo signal in the Audio Sources window.
6. To assign a DSP functions to a selected fixed processing, select the desired DSP function in the Available Functions list and click . Alternatively, you can double-click on the desired DSP function or drag it to the Selected DSP Functions list.
7. To change the parameter of a DSP function, in the Selected DSP Functions area, double-click on it, a parameter window opens. In this window the respective parameters for each DSP function are shown. (For a list of parameters see fixed processings)

Fixed Processing, parameter settings for the transient limiters.

All levels generally relate to the internal reference level of 0 dBint. For example, if a limiter at a digital output configured with a headroom of 9 dB should trigger exactly at the maximum level of 0 dBFS, you have to set them to 9 dBint.

In the Edit Fixed Processing area, you can also select which parameter data are loaded in case of a firmware start/reset. You can choose between Parameters from Toolbox or Parameter from Device. The parameters from Toolbox are the parameters which are set by default in the Toolbox5 Config file. The parameters from the device are the values which are maybe changed by a DSP control software.

For the configuration of a fixed processing, you have the following options:

• To remove a DSP function from the Selected DSP-Functions list, select the DSP function and click . Alternatively, you can also drag the DSP function from the Selected DSP Functions list to the Available Functions list.
• The order of the entries in the Selected DSP Functions list (top to bottom) also indicates the signal path. You can change this order by dragging a DSP function to a new position in the list.
• To remove a selected fixed processing from the Fixed Processings list, click Remove.

Each DSP-Module RM420-848L and RM420-848M is able to calculate 24 stereo DSP processings. Because of that up to 72 DSP processings per device are possible. Because the dual MADI modules RM420-422S occupy some channels on the TDM bus system, that are normally used for DSP processings, the usage of these modules can influence the DSP load.

Apart from that, the available DSP processings are used for fixed processing and for fader input processing. When configuring the fader modules, the corresponding number of DSP processings is automatically occupied .

The following table shows the total number of DSP processings for the different combinations of DSP modules and dual MADI modules:

The total number of fixed processings is limited by the maximum DSP capacity available in the system. The DSP capacity is indicated below the project tree and constantly updated during the configuration process. The DSP capacity bar shows the DSP load of the device currently selected in the project tree. If the load reaches 100%, the color of the bar changes from blue to red. In this case, if you try to load a Config to the device, an error message is shown. Uploading a Config is only possible if the DSP load is under 100%.

The Profanity Delay is available for all Series 52 mixing consoles when using 52/XS Cores 52-1801/52-1804, 52/XC Cores 52-740x or 52/XD Cores 52-744x.

The profanity delay provides a delay time between 1 and 20 seconds with parameters for the minimum pitch and the dump amount.

To configure the Profanity delay in the Toolbox5 software, follow these steps:

1. In the project area, select your <Device>. On the Options tab, in the Licensing area, select the Use Enhanced Processings check box.

Enable Enhanced Processings Licence

2. In the project area, select <Device>/Audio/Fixed Processing. Assign the profanity delay to a Fixed Processing and assign, for example PGM1 as audio source.

Profanity delay as Fixed Processing

3. In the Select DSP Functions area, double-click on Profanity Delay. The Profanity Delay parameters window opens.

• In the Delay area, select a profanity delay time between 1 and 20 seconds.
• In the Minimum Pitch area, select the pitch for fade in and fade out (lower pitch is nearly unhearable, but takeslonger time)
• In the Dump Amount area, select if the full (1) delay memory, half (1/2) of the delay memory or a third (1/3) of the delay memory will be dumped when pressing the dump push button on the control surface.

Profanity delay parameters window

4. In the project area, select <Device>/<Mixer>/Console. On the Keys tab, select a push button in a central control module to assign one of the profanity delay key functions from the Key Functions window. You can also use buttons on the TFT/Touch display.

Assign profanity delay key functions to push buttons

5. In the project area, select <Device>/Audio/Output Routing. In the Output Routing area, select an audio output and assign the profanity delay Fixed Processing as Source for this output.

Routing of the profanity delay to an output