Custom firmware turning the Roland SP-808 Groove Sampler into a guitar looper / MPC-style sampler. Reverse-engineered H8S OS, homemade H8S assembler/disassembler tools, and disk-flashable builds that install straight from a Zip or ZuluIDE SD card. Adds MPC sample modes, looper and keyboard modes, and new menus.
reverse-engineering roland sampler looper custom-firmware groovebox h8s firmware-mod rosetta-os sp-808 sp-808ex roland-sp808
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Updated
Oct 24, 2026 - Python