Pure hardware device
This device has no updatable firmware — it runs entirely on analog or fixed-function hardware. There is nothing to track for updates here.
You can still add it to your rig to keep an inventory and track its used market price.
Connect the pedal to a Mac or Windows PC using a USB-C data cable while also powering it with a 9VDC supply. Open Google Chrome and navigate to walrusaudio.io. Log in or create a Walrus Audio account. Select the ARP-87, go to Firmware, choose the available firmware version, and follow on-screen instructions. Windows users may need to install the DFU driver available on the firmware update screen.