If buying the bare PCB you will need in addition:
- 25 snap-in 100k linear potentiometers (Bourns PTV09, Alps RK09K, or similar);
- 25 100k resistors to fit the 0.3″ hole spacing on the PCB;
- 10 ‘Thonkiconn’ 3.5mm jack sockets if mounting directly to the board. Available from Thonk
The kit contains all of the above alongside the PCB.