Copy the groovebox/ folder to the root of a FAT32 microSD card:
groovebox/projects/P1.gbx— the factory demo project (5 patterns, pre-chained in song mode, 128 BPM). Insert card → power on → hold LOAD → tap SONG → PLAY.groovebox/samples/— 14 CC0 drum & texture sounds by lebiro.studio. Browse and assign them on the SAMPLE page; they are yours to use anywhere.groovebox/wavetables/— empty; drop single-cycle WAVs (AKWF) here and they appear as extra oscillators.
The demo project uses only the built-in 808/909 engines, so it plays even without the sample pack. Also available as a one-click zip on the Releases page.