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VXi: Transferring vs Saving Projects... What is the difference?
When tuning a sound system, the most important part is to listen to the system and make changes by ear to make sure the desired sound is achieved. Throughout this process, the user will make a change and listen and sometimes toggle the change back and forth. For this reason, JL Audio chose to design their DSP (digital signal processors) so that changes could be heard almost instantly. When changes are made in TüN®, each change is written (stored) to temporary memory in the device. This method allows the user to hear those changes instantly. Writing to permanent memory takes longer and would result in distracting pauses between every change.
In order to store a project to the DSP’s memory, the user needs to select the ‘Transfer Project to Device’ button . This can be found on the left side of TüN® Software, while connected to any JL Audio system tuning digital signal processor such as the JL Audio TwK®, VXi or MVi DSP-based amplifiers. Any time a change is made, the Transfer Project to Device button will change to yellow
() to indicate that action is needed. In addition to transferring a project to device, the user should also save the project to their computer
so that the project can be viewed in simulation mode or used in the future if needed. The Save Project to Computer
button can be found directly above the Transfer Project to Device
button.
If a network is being used, there will be Network Project Controls with a Transfer Projects to All Amps button visible at the top of the Network Tab just below the presets. Selecting this button will transfer each individual project to each connected device without the need to switch to each device individually. If using a MVi-Hub, there will be additional buttons that allow Network Projects. This means that a single Network Project for all devices can be opened or saved from the Network Tab.

Figure A displays Network Project Control just under the Presets (MVi-Hub Only)
When a device is connected to TüN® and a project is open, there are three places that the project is located. The project is stored in temporary memory on the connected DSP, there is a backup file of the project that is saved by default every five minutes for 3 instances, and of course, it is also open within the software as well. If the communication between the DSP and the software was severed, as long as the DSP is still powered on and TüN® is still open, the project is still open on both devices. The user can simply re-connect to the device and in the dialog window, either choose ‘Open Project from Device’ or ‘Continue Current Project’. If the laptop were to shut off, as long as the DSP is still powered on, the project would be stored in DSP's temporary memory. If both devices were to power off at the same time, don’t worry, TüN® has created a backup of the open project within the previous five minutes. This can be accessed from the ‘Restore a project from a backup file on your computer’ button or the Preferences button at the bottom left corner of the software
.
When connecting a device to TüN® Software, there are several possible dialog windows that a user may experience. If TüN® is launched with a device connected, after selecting that device, the user will likely see the dialog window in Figure B. The user can open the project that is currently on the device, open a previously saved project or create a new project. If TüN® was already open with a project open of the same device type, the user will see the dialog window in Figure C. This dialog will allow the user to continue the current project that is open in TüN®. Beware, choosing this option will result in the current project being stored in temporary memory on the device. If this option was selected by mistake, the user should disconnect the device and power it down. Any project that was previously stored on the device should remain intact as long as the user didn’t select the Transfer Project to Device button .
Figure B displays Device Connected with several options
Figure C displays Device Connected with several options
If there is a project on the device that has been retained in temporary memory, the user will see the dialog box in Figure D. The user can open the unsaved project from the device, discard the unsaved project and create or open a new project, or continue the current project that is still open within TüN® Software.
Figure D displays device connected with unsaved project in temporary memory