These are ImHex Hex Editor patterns for KORG E2 related files
Windows: place under C:\Program Files\ImHex\patterns\KORG Electribe 2\
Linux: place under ~/.local/share/imhex/patterns/KORG Electribe 2/ or /usr/share/imhex/patterns/KORG Electribe 2/
Then, restart ImHex, and it'll auto-detect opened files that are KORG E2 related.