Quantity   Component name
1 × Raspberry Pi 2B, 3B or 3B+
1 × Micro-USB PSU (2A or more)
1 × 8GB SD card
1 × Raspberry Pi's official 7" Touchscreen
1 × RasPiO Analog Zero http://rasp.io/analogzero
8 × Piezoelectric sensors http://www.puiaudio.com/product-detail.aspx?categoryId=5&partnumber=AB1541B-LW100-R
1 × USB Soundcard or Audio Codec (for instance: https://www.justboom.co/product/justboom-dac-hat/)