Builder make a kit for your MPC500 / MPC1000
Builder = assemble a pad kit and export it for the SD card. (The Emulator tab just plays a kit back.) 1 Pick grid 2 Drop samples on pads 3 Download → SD card

Pad Kit

Each square is a pad. Filled = has a sample. The blue chip is the computer key that plays it.

Drums (808/909/Lo-Fi/Exotic), Percussion, plus melodic Keys & Bass — generated on your machine, loaded onto the active bank.
Bank
4 banks per program — 48 sounds on MPC500, 64 on MPC1000.
Grid

Click a pad to select/play. Drop a .wav/.mp3 onto a pad to assign it — it's auto-converted to 16-bit / 44.1 kHz and volume-matched. Play from your keyboard using the highlighted keys. Right-click (or long-press on touch) a pad for options: volume, cut/trim, reverse, pitch… Banks: click A/B/C/D or press F1–F4.