Sounds on Event
(Menu/Advanced Settings/Sounds on Event)
You can assign a sound message to any transmitter control, which will be triggered by its movement. For example, a confirmation message can be played when the gear or flaps are deployed. This significantly improves control comfort, pilot confidence, and orientation during flight.
Controls Overview:
- F1: Play the selected sound file for preview
- F2: Stop playback
- F3: Assign a new event sound
- F4: Delete the selected event sound
- OK: Confirm choices and exit the menu
Switch: Select the control that will trigger the sound file. The symbol next to the selected control shows the current function status. When configuring, it’s important to correctly define the start and end points, as well as the control’s movement direction. Use F3 (Rev.) to reverse the function if needed.
Tip: If the switch is a two-position toggle, it’s important to set the trigger direction. One sound can be played when toggled from top to bottom, and a different one when toggled in the opposite direction. A three-position switch can trigger up to four different sound files.
Tip: If a proportional control is used, you can configure it as a three-position switch using F2 (Prop.). When kept as a proportional control, move it to the desired position and press F1 (graph icon) to set the activation point (trigger threshold) for the sound file.
File: Choose a suitable sound file from the transmitter’s internal list. Sounds are located in the “Audio” directory. Any new custom sound files must also be uploaded to this folder. When selecting sound files for Event Sounds, the file browser opens automatically.
Creating Custom Sound Files:
The transmitter includes only basic sound files by default. To create your own, you can use a text-to-speech tool such as https://ttsmaker.com/cs. Duplex transmitters support .wav and .mp3 sound file formats.
Sound of Prop. Controls
(Menu/Advanced Settings/Sound of Prop. Controls)
You can assign up to six transmitter controls a customizable voice message that will be played once the control reaches a defined position. Typical uses include announcing when a stick reaches its center position or announcing the current deflection value of the control in percent.
Control: selection of the control
Tip: When choosing a control type with a central neutral position, the sound will play when this center is reached. For controls without a central position, the sound is triggered when reaching the lower end of the range. You can adjust the trigger point along the control’s range using button F2 (Prop.), followed by F1 (graph symbol).
Mode: choose the type of notification from the available options:
- None: no sound will be played.
- Center-Beep: a short beep when the control passes through the center position.
- Voice: the current deflection percentage is spoken after movement stops. With each change in position, the new value will be announced.
- Vibration Alarm: similar to “Center Tone,” but the control stick will vibrate briefly (only available if the transmitter supports vibration).
Tip: Vibration intensity can be adjusted in Menu/System/Configuration/Vibration Intensity.
Tip: If the selected control type (using F1 “Centr”) has no center position (e.g., throttle stick), announcements will range from 0–100% of stick deflection. If the control has a center position (e.g., aileron stick), 0% is announced at center, and the range will be ±100% for each direction.
When using the Voice mode, you can additionally select a File to append a sound file to the percentage announcement.
Example:
If you assign the Flap control to Voice mode, the transmitter might say “Twenty percent” when the flap deflection is 20%. If you also add the audio file Flaps as a prefix, the transmitter will say “Flaps twenty percent.”
Telemetry Controls
(Menu/Advanced Settings/Telemetry Controls)
The Duplex system’s receivers and telemetry sensors installed in the model provide a large amount of information and data, which is transmitted, processed, and archived in real time by the transmitter. This telemetry data can also be used to control model functions. This is useful for automating tasks that would otherwise need to be controlled manually.
For example:
- automatic deployment of flaps when the speed drops below a set value,
- gear extension after reaching a minimum altitude,
- or automatic deployment of pneumatic landing gear when air pressure drops below a minimum safe threshold.
Depending on the transmitter model, up to 16 telemetry controls (labeled Mx1 to Mx16) are available.
The Telemetry Controls function will be explained using one example and followed by a description of other configuration options.
Use Case:
The model is equipped with pneumatically operated landing gear and a telemetry sensor "Mbar" that monitors, among other things, the air pressure in the pressure reservoir. When the pressure drops below a preset safe threshold, the landing gear will automatically deploy.
Tip: The minimum safe pressure value should be set so that there is enough remaining pressure in the tank for at least one full gear cycle (retraction and extension) and for braking the model.
Control Description:
- Label: Manual entry of the telemetry control name for easier identification in the transmitter menu.
Example: "Gear"
- Active: Global activation or deactivation of this telemetry control.
Selected: "Enabled" - Sensor: Select the sensor from the list.
Selected: MBAR:Pressure (kPa)
Tip: If the desired sensor does not appear in the list, it is likely not connected correctly, or the input it’s connected to is not configured properly.
A list of functioning sensors can be found under
Menu/Timers–Sensors/Sensors–Data Logging.
Press F1 (Auto) in this menu to re-scan all active sensors in the model.
Element Type:
- Switch: The telemetry control will behave as a two-position switch based on the conditions defined in the Condition section.
Example: If pressure is lower than 2.2 kPa ± 0.2 kPa, the gear will always be extended.
Duration: Defines the minimum duration for which the value must stay below the decision threshold. This prevents oscillation around the trigger threshold.
Default: sets the basic control value used when the telemetry control function is disabled.
Switch: defines the switch that enables or disables the telemetry control from the transmitter.
– On the transmitter, go to Logical Switches (Menu/Advanced Settings/Logical Switches), select and activate switch L1.
– Enter a description (e.g., “Pressure”) and assign “Controller 1” using the F1(+) button from the “Telemetry Controls” list, selecting the previously created telemetry control Mx1.
– For “Controller 2”, assign a manual switch (e.g., Sa), which you’ll use to manually control the gear retraction and extension, as long as sufficient air pressure is available (more than 2.2 kPa).
– Set the condition type of this logical switch to “OR”.
– In Menu/Model/Function Assignment, assign the “Gear” function the logical switch L1 using the F1(+) button from the “Logical Switches” list.
Result: When the pressure in the pneumatic system is above the threshold of 2.2 kPa ±0.2, gear retraction/extension will be controlled by switch Sa. If the pressure drops below this value, the logical switch will trigger and the gear will automatically extend using the telemetry control. Once pressure rises above the threshold again, gear operation returns to switch Sa.
Proportional Control: the telemetry input behaves like a proportional control. For example, flap extension can be adjusted proportionally based on airspeed.
Range: sets the center value and active range for the sensor. This range is proportionally converted to the control range.
Filtering: smooths the received telemetry data values.
Tip: Higher filtering results in a smoother and more gradual output but slower response.