Selection of the source from the assigned Input Pool of the fader, pool number and name of the source are displayed (Fader Channel Label).

Function is only available at a closed fader (Disabled when Fader= On).

For faders with fixed source, no Pool is displayed.

If you configure a function Access Input Select in the Fader Module, do not need this function (esp. for the modules RM420-012 and RM420-014). The rotary encoder has the function Input Select immediately after pressing the key in the Fader Channel. This function is exited as soon as you press another key with System Function or the Access Key in the Fader Module again.

No function, error in some Toolbox4 versions. Please use the function CF Out.

Operation of all configured functions in the selected Fader Module by use of rotary encoder and OK key.

Useful for setting functions that are rarely used (e.g. 48V phantom voltage) and to save the corresponding keys.

You can not restrict the choice of the available functions in this menu!

For this function you need to configure an OK key!

OK key, necessary for switching the menu level or for operating the Load/Save functions.

The function is not general for all modules. It is only valid for the module containing the corresponding functional keys and the associated display.

Cancel key, used for cancelling a pending request. This key is currently used for managing Global Resources only. If you press it simultaneously with a resource request key, a pending request for a resource is cancelled.

The function is not general for all modules. It is only valid for the module containing the corresponding functional keys and the associated display.

This function is available for all sources, not only for Fader Channels with configured Clean Feed.

In earlier firmware versions, instead of CF (Clean Feed) the abbreviation MPX (Multiplex) is displayed.

This function is available only for Fader Channels with Clean Feed.

PGM n - switches Program Bus with number n ON/OFF using the rotary encoder.

Function is not locked when fader is open.

The attack time can not be configured, it is always set to ”fast“.

The function is not reasonable for the module RM420-012, since separate rotary encoder and displays for the compressor functions are available.

You must configure one key per equalizer band (n=1...4), in most cases, all 4 are used.

This function is not reasonable for the modules RM420-012 and RM420-14, since a separate rotary encoder and displays for these functions are available here.

The switching of the EQ type is not noiseless!

This subsonic filter is a 3rd class high pass filter (18dB/Octave). For higher filter classes, please use the function Var.LP/HP. (see function Var.LP/HP)

You need to configure one key (n=1...2) per variable filter.

The switching of type and filter rate is not noiseless!

Each full turn of the rotary encoder means a change of 160ms of the delay time.

There is no function.

Function for creating up to 6 different alternating monitor key sets. Each monitor bus must have at least one and can have an arbitrary number of keys.

Monitor keys are assigned to the internal stereo monitor buses Monitor Bus 1L,R to Monitor Bus 6L,R.

Monitor buses can be selected in the Audio Sources Window under Monitor Functions/Monitor Bus 1...6L,R as sources for Output Functions or for the Output Routing.

Monitor busses can also work with sources from other Devices. (see Global Pool Lines - Using Pool Signals between several Devices)

Monitor buses can not be used as sources for other DSP functions — e.g. Fixed Processing. (For this, you must use an Output Function!)

Summation monitoring is not possible with this function, the keys are alternating. Only one source can be switched on at any time.

If you press the same key again, the monitor bus switches to the Default Monitor Bus Source selected under Audio System/Monitor Functions. The default setting is Program Bus 1, for Mute select None. (see also Monitor Functions – Options for Monitoring)

You can extend the key set with the Rotary Monitor Selectors 1...6 that can be controlled by rotary encoders. Therefore, you need to assign the audio source Monitor Functions/Rotary Monitor Select L,R from the Audio Sources Window to the key.

Monitor key sets of a monitor bus can span several modules, e.g. using the modules RM420-012 and RM420-025.

Monitor key sets of a monitor bus can also span several modules using a key in each Fader Channel. (Function Monitor Bus Control in Fader Modules), e.g. with the modules RM420-012 and RM420-020.

Monitor key sets of a monitor bus can also be operated parallel in several modules, e.g. in the studio using the RM420-011 and parallel in the control room using the RM420-012 (also with Monitor Bus Shift, see below).

Monitor buses themselves are no audio channels on the TDM bus system, but are created internally using special routing functions!

Special function: Keys with Monitor Bus 0 normally correspond to Monitor Bus 1, but with the key function Monitor Bus Shift they can feed one or more other Monitor buses 2...6.

Monitor Bus 1 is not influenced when using the “Shift” function, the selected source remains the same.

Monitor Bus shifting is reasonable e.g. to save keys.

The LEDs of the keys always show the state of the Monitor Bus that just has been selected using Monitor Bus Shift, or the state of the Monitor Bus 1, if no Monitor Bus Shift key is pressed. It is not possible to use several LED colors for indicating the states of the Monitor buses!

Selection of any audio source available on the TDM bus as well as of the corresponding Rotary Monitor Selector for the left channel of a Monitor Bus.

Selection of each of the audio sources available on the TDM bus as well as of the corresponding Rotary Monitor Selector for the right channel of a Monitor Bus.

If a Global Pool has been configured and a Global Pool Line has been reserved for the current Monitor bus, you can activate this check box. You can than use audio sources from external devices on this monitor bus. (see Global Pool Lines - Using Pool Signals between several Devices)

Monitor keys with Monitor Bus 0 normally correspond to Monitor Bus 1, but they can feed one or more other Monitor buses 2...6 with the key function Monitor Bus Shift.

The operation of the corresponding Rotary Monitor Selectors can also be switched with this function.

This function activates the operation of potentiometer functions using key and rotary encoder in the Control Module.

In order to use it, in advance you have to select a potentiometer from the list under Audio System/Potentiometer and change its preset name (Pot. x) to make it visible in the selection menu! (see Potentiometers )

The potentiometers can affect audio signals using Output Functions.

Parallel operation of the same potentiometer is possible.

You can use this function as display for external and pre-defined potentiometer sources. Sources can be: ACI (RM420-122), Global Potentiometers and the electromechanical potentiometers of the Modules RM420-010/011/012/013/014/026.

Here, only yellow is reasonably usable as key color for „On“. The red LED is automatically used to indicate a setting different from the neutral position if the function is inactive.

Reasonable for setting the balance of the monitor speakers.

The potentiometer values are calculated using a table and are available for the Output Functions Balance 1L and Balance 1R (or Balance 2L and Balance 2R).

This functions assigns the rotary encoder as control to the selector with the chosen number.

So you can extend the monitor key sets created with Monitor Bus 1...6 or independently use the selector for monitoring and routing.

You have to assign a Source List with audio sources to each Rotary Monitor Selector under Audio System/Monitor Functions/Rotary Monitor Selector. (see Rotary Monitor Selector)

You define the selectable sources of the Source Lists under Audio System/Selector Source Lists. You can use up to 30 different Source Lists. (see Output Selector Source List)

Only for Output Functions can you use the Rotary Monitor Selectors as audio sources. You find them in the Audio Sources Window under Monitor Functions/Rot. Monitor Selector 1...30L,R.

Rotary Monitor Selectors can not be used as sources for other DSP functions, e.g. for Fixed Processing or for Output Routing. (For that, you have to use an Output Function!)

Monitor buses themselves are no audio channels on the TDM bus system but are created internally using special routing functions!

Independent of this key function, the modules RM420-012 and RM420-014 provide a separate display and a rotary encoder Selector. The selector is available for operating the Rotary Monitor Selectors 0 to 30. (see Special – Configuring Displays in Control Modules)

The Rotary Monitor Selectors 1…6 are available as sources for the Monitor Buses 1...6. They can be assigned to the corresponding Monitor Bus as source of a monitor key in the Audio Sources Window under Monitor Functions/Rotary Monitor Select L,R.

If the Monitor Buses 1...6 are not used, you can freely use the Rotary Monitor Selectors 1...6, e.g. for routing.

Special function: Rotary Monitor Selector 0

Normally corresponds to Rotary Monitor Selector 1, but can feed one or more other Rotary Monitor Selectors 2...6 over the key function Monitor Bus Shift.

The key function Monitor Bus Shift 2…6 always influences the Rotary Monitor Selectors 2...6, too.

This function activates the logic source Logic Source/RM420-xxx #m/KEY #n label, if this key is pressed or active (for engaging keys activate checkbox Toggle). #m stands for the number of the module, #n for the number of the key.

You can use the created logic source in many different ways, e.g. for logic functions, Output Functions, Global Logic Functions or controlling of GPOs.

You can define up to three different Lamp Sources. Select the desired row from the table Lamp Source and assign a logic source per double click or Drag & Drop. Each available source in the Logic Sources Window can be assigned. (Mostly, this is the key itself using Logic Source/RM420-xxx #ID/KEY #No label.)

By right-clicking in a row of the table Lamp Source you can change the color of the LED.

You can change the order of the three rows by Drag&Drop using the left mouse key.

The LED with the higher priority shines when its Lamp Source is active; Two colors can not shine at the same time!

The LEDs of the keys can be used for displaying system states even without a key function. This is useful for testing GPIs.

The key engages. If this checkbox is not active, the function remains active only as long as the key is pressed. The key itself should serve as Lamp Source to clearly indicate the state.

Key is engaging (short press) or alternating (long press). The key itself should serve as Lamp Source to clearly indicate the state.

Key functions for loading and saving the two different setup types -– Channel Setup and Mixer Setup.

Loading and saving can take some seconds, independent from the amount of data saved in the setup!

Please read in the volume System Reference of the manual, which settings and functions are contained in the setups and which are not.

Loads Input Gain- and Input Processing settings for the channel selected with ACCESS.

Setup selection from 0 to 250 (12 steps per turn).

Channel Setup 0 is an empty setup (all parameters are 0dB or processing inactive).

Saves all settings for Input Gain and Input Processing for the channel selected with ACCESS.

Selection of the setup from 1 to 250 (12 steps per turn).

A write protection for individual setups is not possible!

Loads all Input Gain and Input Processing settings for a defined fader.

Selection of the setup from 0 to 250 (12steps per turn).

Channel Setup 0 is an empty setup (all parameters 0dB or processing inactive).

Loads Input Gain, Input Processing, Input Routing, summation, Aux and Clean Feed settings of all defined Fader Channels of the mixer.

Selection of the setup from 0 to 6.

Open faders are not overwritten (their ACCESS keys are flashing), after closing the fader, the setup must be loaded again.

Saves Input Gain, Input Processing, Input Routing, Summation, Aux and Clean Feed settings of all defined Fader Channels of a mixer.

Setup selection from 1 to 6.

A write protection for individual setups is not possible

Setup 0 (Default Setup) can only be saved using the Maintenance window of the Toolbox4 software and should be provided with reasonable preferences for the Device. This is especially true for the analog gains of the microphone and the phantom power. (see Save Setup 0)

Loads Input Gain, Input Processing, Input Routing, Summation, Aux and Clean Feed settings of all defined Fader Channels of the mixer.

The setup is loaded directly while pressing the key for about one second.

Open faders are not overwritten (ACCESS keys are flashing), after closing the fader, the setup must be loaded again.

Loads Input Gain, Input Processing, Input Routing, Summation, Aux and Clean Feed settings of all defined Fader Channels of the mixer from the smart card.

The setup is loaded directly while pressing the key for about one second.

You have to define the key in the module RM420-013 that the card reader is connected to.

Open faders are not overwritten (ACCESS keys are flashing), after closing the fader, the setup must be loaded again.

Each smart card stores one mixer setup. You can work with one smart card setup on two mixers, only if both mixer are configured identically.

Saves Input Gain, Input Processing, Input Routing, Summation, Aux and Clean Feed settings of all defined Fader Channels of the mixer to the smart card.

Each smart card stores one mixer setup.

Write protection is not possible!

You have to define the key in the module RM420-013 that the card reader is connected to.

The rotary encoders of the modules RM420-023 (Overbridge, Encoder No. 1 - top and No. 2 - bottom), RM420-028 (Overbridge, Encoder No. 1,2,4,5 from top to bottom) and RM420-029 (Fader Module, Encoder No. 3) are assigned the selected subfunctions for all Fader Channels.

Independent from the central assignments, the encoders can be assigned locally differing functions for each Fader Channel. This overwrites the central function as long as the local function is active.

No function.

Assigns the function Digital Gain to the encoder.

Assigns the function Pan/Bal to the encoder.

Assigns the function EQ1 Gain to the encoder.

The encoder key sets Gain to 0dB.

Assigns the function EQ2 Gain to the encoder.

The encoder key sets Gain to 0dB.

Assigns the function EQ3 Gain to the encoder.

The encoder key sets Gain to 0dB.

Assigns the function EQ4 Gain to the encoder.

The encoder key sets Gain to 0dB.

Assigns the function EQ1 Freq to the encoder.

Assigns the function EQ2 Freq to the encoder.

Assigns the function EQ3 Freq to the encoder.

Assigns the function EQ4 Freq to the encoder.

Assigns the function Sub Sonic Freq to the encoder.

Assigns the function Var.LP/HP to the encoder.

Assigns the function CF In to the encoder, that can modify the input level into Clean Feed System.

Assigns the function CF Out to the encoder that can change the output level of the Clean Feed or of the alternative output. The assigned Talk Source is also influenced.

The function is only available for channels with configured Clean Feed.

Assigns the function Input Select to the encoder.

The function is only available for channels with configured Clean Feed and activated Output Selector Source List.

Display of the channel related timer, start at fader start.

Display minute:second.

The count down time can be set using the encoder key.

Assigns the function Delay to the encoder (if module RM420-424 is built in and configured).

Pre-selection of the Aux bus to be adjusted using the main rotary encoder and display (RM420-013).

Reasonable if Aux buses>16 are adjusted using the encoder.

Function only available in modules with rotary encoder and display, mostly RM420-013.

Assigns the function AUX#n Gain to the encoder.

You can switch with the encoder key between three aux modes: Pre Fader, After Fader and Switched Pre Fader (Display of A, P, S before Gain value).

You need to assign a key for each Aux Bus 1...16.

For the Aux buses>16 you have to use the function AUX Select.

Adjusts stereo width from 0 to 2. 0 equals a punctual projection of the signal,1 is the original width. The increment is  0.05.

Direction of source projection. The increment is 1.

Assigns the function EQ1..4 Gain to the encoder.

If you press the encoder key, it changes to the function EQ1..4 Freq.

Assigns the function EQ1..4 Gain to the encoder.

If you press the encoder key, it changes to the function EQ1..4 Freq.

If you press the encoder key again, it changes to the function EQ1..4 Qual..

Switching function on/off directly.

48V Phantom Power, only possible for RM420-122.

Phase inversion (only right channel for stereo signals).

For stereo signals, the left input signal replaces the right one.

For stereo signals, the right input signal replaces the left one.

Side exchange of input signals of stereo inputs.

Mono summation of the input signals of stereo inputs.

Mono summation -3 dB of the input signals of stereo inputs.

Mono summation -6 dB of the input signals of stereo inputs.

Switching onto the Program bus (similar to function Program Bus ON/OFF).

Bus number see Audio System/Mixing Functions.

The function can not be locked at open fader!

Switching onto AUX bus.

Bus number see Audio System/Mixing Functions.

In the AUX Gain display, O overwrites the available display of mode A, P or S in Off state!

The function can not be locked at open fader!

Switching on/off of limiter (if configured).

Switching on/off of compressor (if configured).

Switching on/off of expander (if configured).

Switching on/off of equalizer (No. 1 to No. 4, if configured).

Switching on/off of AGC (if configured).

Switching on/off of Subsonic filter (if configured).

Switching on/off of Deesser (if configured).

Switching on/off of Deesser 2 (if configured).

Switching on/off of the Noise Gate (if configured).

Switching on/off of Variable High pass/Low pass filter.

Device Number 1 and 2, if two filters are configured. In this case, both filters are influenced.

Assign the function Delay to the encoder (if module RM420-424 is built in and configured).

Signal path over RM420-424 remains also in off state (Delay = 0).

Switches the Clean Feed return signal between N-1 (OFF) and N (ON).

Switches the Off Air function on and off.

Switches the alternative Clean Feed return signal on and off.

The function is only available for channels with associated Clean Feed signals.

Activates the signal path over one of the four Switchable Insert Points.

Switching is exclusive, each Switchable Insert Point can be activated for one fader only! (see also Switchable Inserts)

Display of a timer in a module with display.

The corresponding display in the modules RM420-010/011/012/013/14 must be assigned the correct timer number using Console/Keys/Special (left mouse click on the display). Furthermore, a different Access Group must be assigned to the module, in order not to switch the timer display when pressing an ACCESS key!

Manual timer start.

Manual timer stop.

Resets timer to 0.

Pre-selection of a count down time using a rotary encoder (approx. 2min per turn).

After reaching time 0, the elapsed time since start is displayed!

Timer can be started with fader start.

Only the fader starts of the Fader Channels work where the option Timer Reset was activated. (see Fader Channels – Configuring Signal Sources for Faders)

The keys are used for routing signals to the TDM bus to an output or an Output Function.

You need to define one key for each source and one for each destination.

The routing can be mono and stereo depending on the configuration, but it is uniformly mono or stereo for all keys! Do not used mixed routing of mono and stereo signals!

If you press a key of a source, the keys of the routed destinations are flashing.

If you press the key of a destination, you can select a new source. The old and the selected sources are flashing, the new source can be taken over with Take. Without the Take function, routing happens immediately.

Routing can be carried out over several modules, e.g. one RM420-025 for sources and one RM420-025 for destinations.

Selection of an arbitrary source for the left channel from the window Audio Sources Window.

Selection of an arbitrary source for the right channel from the Audio Sources Window.

If the routing function is used mono, there will be no selection of a source for the right channel.

For each output key, you must state an unique (!) internal Routing number. This number is available in the Audio Sources Window under Routing/Routing <RoutingNumber> L,R and can be routed to outputs or Output Functions.

If the routing function is used mono, there is no selection of the right source.

It does not matter which routing number you use for an output key, but you must not assign it twice!

The routing number is no channel on the TDM bus so it does not consume any resources.

If you switch on this checkbox, routing is carried out only after pressing the Take key, otherwise immediately. This option can be used for each key separately.

This key controls the optional Take function for the routing. If used, it has to be configured once per system.

This function outputs key codes for MIDI functions using the Ethernet port.

Reasonable for coupling audio workstations with motor faders, if the audio workstations support external MIDI controllers.

For this function, you need the separate PC software RM420-554 and a PC MIDI Interface. There is no MIDI interface at the RM4200D itself, a PC with the software is necessary for routing the Ethernet to MIDI.

Available only when talk back matrix is activated.

List of all talk back sources configured within the matrix. (see also Talk)

Available only when talk back matrix is activated.

List of all talk back destinations configured within the matrix.

List of all resources within in the project the current Device is a subscriber of. (see also Defining Global Resources)

Use this key together with the OK key to manage Global Resources. With these two keys you can request, release and take over resources.

Configure the key to use two colours: red for ON and yellow for OFF. Using these two colors the following conditions can be indicated:

List of all subscribers configured, for which the resource can be requested and reserved.