Upgrading from v1.x to v2.x requires you to remove all user data from disk. A prompt will guide you through the process—no data will be deleted automatically.

When prompted to wipe the S4, the device will automatically enter USB MASS STORAGE mode. Simply connect it to your computer via USB to back up your files.

The v2.x installation cannot proceed if any user samples, recordings, or projects remain on the S4.

When the installation is complete, you can transfer any user samples, recordings and projects back on to the S4.

1. Download the latest S4 OS update file.
2. Connect the S4 to the computer using a USB-C or USB-C to USB-A cable (depending on computer).
3. Enter USB MASS STORAGE mode on the S4.
4. Drag and drop the update file into the root folder of the S4 (the top level of the drive, not inside any other folder).
5. Use the computer’s eject function to disconnect the S4.
6. Tap [CONFIG], go to SYSTEM menu.
7. Select INSTALL UPDATE to install the update.

When the S4 has completed the installation of the OS, the system will reboot and the update file will automatically be removed from the device.

Plugging in an external USB Flash Drive with an S4 update file will automatically update the S4

The S4 requires a .zip file for performing firmware updates. Please make sure not to unzip the downloaded file before transferring it to the S4.

Re-zipping the firmware once it has been unzipped will not work.

We frequently encounter issues with Safari automatically unpacking zip files post-download. To prevent this, please uncheck the box in Safari called “Open files after downloading” in - > Settings -> General

Make sure the file isn’t a duplicate. Duplicate files will be named with a number in a parenthesis. E.g. S4-OS-v1.2.2 (1).zip

Empty the trash - not enough space can cause the error

Use RECOVERY mode to boot your S4 into USB MASS STORAGE.

Power down the S4. Connect a USB-C data cable from your computer to the S4, and power on the unit. Under [SYSTEM] select USB MASS STORAGE.

Connect your S4 directly to the computer without a USB hub.

Flip the USB cable.

Make sure to use a USB-C data cable and not a USB-C power cable to connect to your computer.

Make a power cycle (Unplug and replug the power supply).

FACTORY RESET the unit.

If your S4 unit still won’t go into USB MASS STORAGE mode, contact our support.

1. Hold [CTRL] and connect the PSU into the S4.
2. Wait a couple of seconds.
3. The S4 will display Recovery mode and go into USB MASS STORAGE.

Make sure to format to FAT32

Use a recent and fast drive for best performance

Avoid connecting through a USB hub

If your T1 got bricked during a firmware update you will need to perform a manual firmware upload. Follow the instructions below to perform a manual firmware upload:

• Run from the menu bar of T1 Config: “Tools” → “Download Firmware”
  This will place a .zip in your download folder
• And then “Tools” → “Upload Firmware”
  Select the downloaded .zip in the pop-up dialog
• The script will now upload firmware to your T1, it takes about 2 minutes.

NOTE: If automatic port detection fails, follow the on screen instructions to manually enter the serial port.
macOS:  It will be called something like “/dev/tty.usbmodemXXXXX”
Windows: It will be called something like “COMxx”, select the one with baudrate = 115200 or 460800

There are two known reasons for this behavior.

1. T1 got bricked during a firmware update.  

- To fix this you can flash the firmware manually.

2. One of your saved banks is corrupt, causing the T1 to keep crashing upon startup.

- To fix this you can do a factory reset, which will erase all banks and settings

Make sure that you are following these steps before updating:

• You have the latest version of T1 config installed.
• You have connected the T1 directly to your computer without any usb-hubs.
• You have removed all MIDI cables from the T1.
• You are not sending any MIDI including clock via the usb.

If the process keeps failing see “How do I perform a manual firmware update” to update to the latest version included in the T1 Config tool.

Check that your T1 is appearing as a midi device in your DAW and is responsive when powered up. If this is the case here are some things you can try to make T1 Config load:

• Make sure that you have the latest version of T1 config installed.
• Perform a manual update to ensure your are running latest firmware.
• Reload the Config app by pressing “CMD+R”/”CTRL+R” or “View” → “Reload”.
• Unplug and replug T1 directly to your computer ( avoiding any usb-hubs).

If any other external midi devices are connected, try to disconnect them and then go to 1. and 2. 

• Try flipping the usb-c connector.

Follow the instructions below to boot your T1 in safe mode:

• Hold [ CTRL ] while plugging in power to your T1. You can release the button once the first track button LED is lit in orange.
• Your T1 should now boot with an empty bank.

TIP: Banks are not automatically loaded in safe mode, so you can use this to check if you have a corrupt bank

On the T1, a factory reset is done by erasing all banks and settings:

• Run from the menu bar of T1 Config: “Tools” → “erase banks and settings”
• The script will now erase the file system on your T1.
• After the process is completed the T1 will reformat with the LEDs lit in orange. This can take up to 1 minute before the reformatting is completed.

Tip: If your T1 crashes upon startup, it might be due to a corrupt bank. Use safe-mode to check if this is the case, and use factory reset to fix the issue