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Prism II Support Page

A+ Prism II
Complex filter-pad pedal with extensive sonic capabilities.

Updating the Firmware

Since the release of the Prism II in May 2021, multiple changes have occurred to the device's firmware. You can view the changelog here.

The current firmware version (1.2) is installed on pedals manufactured after August 30, 2021. If you bought the pedal on an earlier date, we advise that you update the Prism II firmware to the latest version presented on this page.

Please note that updating the firmware may alter the pedal's sound settings. If you're actively using the pedal in a project right now, it may be advisable to only update the firmware once the project is over.

NB! An interrupted firmware update can render the pedal unusable. If something goes wrong during the update, the pedal will most likely need to be serviced by Shift Line's qualified specialists. Please use the feedback form if you experience any issues with the firmware update.


Follow these steps one by one:

  1. Disconnect all cables from the Prism II, then connect them in the following order:
    • First, connect the pedal to your computer via a microUSB cable.
    • Next, connect the power supply to the pedal.
  2. Both LEDs should now be glowing blue: this means the pedal is ready for the firmware update. If that's the case, you can proceed to the next step.
  3. Open the PRISM 2 drive and delete the AFXSETUP folder (remove it from the bin, too).
  4. Copy the update file (p2update.bin) to the root folder of the PRISM 2 drive. NB! Do not rename the update file.
  5. After the files have been copied, safely eject the PRISM 2 drive from your computer.
  6. Disconnect the cables in the following order:
    • First, disconnect the power supply from the pedal.
    • Next, disconnect the microUSB cable.
  7. After that, reconnect the power supply to the pedal.
  8. The pedal will start the firmware update as soon as the power supply is plugged in.
The firmware update takes two minutes to complete. The Prism II indicates various stages of the update process by LED colors. When the update is over, the pedal goes to a bypassed state and indicates the tempo with the TAP LED.

After all of the above steps have been completed, the pedal is ready for use again. You can verify the success of the update in the config file. To do that, open the AFXSETUP folder in the PRISM 2 drive and open the PRISM2.SET file with a standard text editor. The firmware version is displayed in line 3:

/* Prism II
* Hardware Ver. 1.2.7
* Software Ver. 1.2 2021-10-24

The latest firmware version to date is 1.2

Working with the Config File

Fine-Tuning via USB

On the right side of the Prism II, you can find a microUSB port which lets you connect the pedal to your computer. To do that, you need a microUSB cable (purchased separately). The USB port on your computer should be USB 2.0 or higher.

NB! Before performing any actions with the PRISM 2 drive, make sure the cable is fully functional and there are no interruptions in the connection.

Connect the cables in the following order:
  • Connect the power supply to the Prism II.
  • Connect the Prism II to your computer with a microUSB cable.
  • If the connection is successful, a PRISM 2 drive will appear on your computer. This means the pedal is ready for further operations.
  • Before disconnecting the microUSB cable from the pedal/computer, make sure to safely eject the drive first.
  • Do not disconnect the microUSB cable until all operations with the PRISM 2 drive have been finished!


The device's flash drive has an AFXSETUP folder which contains the PRISM2.SET file. The file can be viewed and edited in any text editor: simply right-click on the file and select an editor to open it with (you can also configure your system to open *.SET files with your text editor of choice).

The PRISM2.SET file is a set of configurations which the pedal accepts to edit the sound processing programs. We recommend editing the config file to users with at least a basic programming background.

While editing the PRISM2.SET file can go wrong (by entering improper values or erasing vital data, for instance), no harm will be done to the pedal itself. Simply delete the "bad" file, eject the Prism 2 drive, unplug the power supply from the pedal, then plug it back in. This will make the Prism II generate the default config file again.

If you're still reading this, you are probably ready to enter the magic world of fine-tuning sound processing programs. Give it a try: the config file has a number of useful features which cannot be accessed via the pedal's physical controls.

General Settings

Patch Settings

Saving Parameters and Configs

Any changes you've made to the config file will be accessible to the device after saving. If you want to hear the changes on the fly, remember to rescan the config file by changing the MODE switch position. The settings saved in the config file will remain in the pedal until the file is deleted. If needed, make a backup for the file on a different drive. Ready-made patch sets can be uploaded to the pedal by replacing the config file. The file name (PRISM2.SET) should not be changed.

Reverting to Default Settings

If you've edited the config file and wish to revert to default settings, you can easily restore the default config file. Simply delete the unwanted config file from the AFXSETUP folder, and the pedal will go back to factory settings.



You can find the update instructions in the archives.