Line samples from a casio ap-45 on the default grand piano patch. Samples every c and g from c2 through to c9 with a short sustain. Velocity is pretty aggressive and it doesn't sound quite in tune to my ear. Feels like it's a little bit out. You may want to tune these yourself, if you plan to use them for anything significant. Minimal post processing on these. Just enough to get them roughly even in terms of overall volume.
Recording of my kalimba tuned to c-major (give or take a few cents), striking the lowest possible note. Recorded on a rode nt1-a through a scarlett 2i2 interface. Noise-reduced for clarity.
I made a tonal quantussy recording. The bass always plays a low c. The 5 tracks are selected from one 15 min long recording. The synth creates defined tracks with different character.